Applied Physics Letters via MedWorm.com MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Applied Physics Letters' source. Mon, 06 Feb 2012 20:24:44 +0100 Response to Comment on `Design of acoustic devices with isotropic material via conformal transformation' [Appl. Phys. Lett. 100, 066101 (2012)] http://www.medworm.com/index.php?rid=5664540&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F066102%2F1%26agg%3Drss Zhihai Xiang, Chunyu Ren, and Zhangzhi Cen Abstract not available. [Appl. Phys. Lett. 100, 066102 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664540 Tue, 07 Feb 2012 01:07:24 +0100 5664540 Ultraviolet electroluminescence from colloidal ZnO quantum dots in an all-inorganic multilayer light-emitting device http://www.medworm.com/index.php?rid=5664539&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061104%2F1%26agg%3Drss We report ultraviolet (UV) electroluminescence (EL) at 3.30 eV of colloidal ZnO quantum dots (QDs) in an inorganic multilayer thin-film EL device. The EL spectrum was identical to the photoluminescence spectrum of the source solution of ZnO QDs, and the emission is attributable to quantum confined e ... [Appl. Phys. Lett. 100, 061104 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664539 Tue, 07 Feb 2012 01:07:24 +0100 5664539 Comment on Design of acoustic devices with isotropic material via conformal transformation [Appl. Phys. Lett. 97, 044101 (2010)] http://www.medworm.com/index.php?rid=5664538&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F066101%2F1%26agg%3Drss Andrew N. Norris Abstract not available. [Appl. Phys. Lett. 100, 066101 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664538 Tue, 07 Feb 2012 01:07:24 +0100 5664538 Analysis of Gouy phase shift for optimizing terahertz air-biased-coherent-detection http://www.medworm.com/index.php?rid=5664537&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061105%2F1%26agg%3Drss Huanyu He and X.-C. Zhang Terahertz (THz) air-biased-coherent-detection (ABCD) uses a local oscillator to enhance THz-wave detection sensitivity by mixing an optical field, a THz field, and a biased electric field (local oscillator) in air. The width of the electrodes providing the local oscillator, the longitudinal distribu ... [Appl. Phys. Lett. 100, 061105 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664537 Tue, 07 Feb 2012 01:07:24 +0100 5664537 Self-aligned lateral dual-gate suspended-body single-walled carbon nanotube field-effect transistors http://www.medworm.com/index.php?rid=5664536&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063103%2F1%26agg%3Drss Ji Cao and Adrian M. Ionescu Self-aligned lateral dual-gate suspended-body single-walled carbon nanotube (CNT) field-effect transistors (CNFETs) have been demonstrated. A nano-precision assembly method using resist-assisted ac-dielectrophoresis is applied. Superior I-V characteristics controlled by two independent lateral gates ... [Appl. Phys. Lett. 100, 063103 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664536 Tue, 07 Feb 2012 01:07:24 +0100 5664536 Two-dimensional electrostatic lattices for indirect excitons http://www.medworm.com/index.php?rid=5664535&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061103%2F1%26agg%3Drss We report on a method for the realization of two-dimensional electrostatic lattices for excitons using patterned interdigitated electrodes. Lattice structure is set by the electrode pattern and depth of the lattice potential is controlled by applied voltages. We demonstrate square, hexagonal, and ho ... [Appl. Phys. Lett. 100, 061103 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664535 Tue, 07 Feb 2012 01:07:24 +0100 5664535 Thermal and structural dependence of the band gap of quantum dots measured by a transparent film heater http://www.medworm.com/index.php?rid=5664534&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063105%2F1%26agg%3Drss We report the temperature dependence of the optical absorption and emission spectra of quantum dots (QDs) for three different nanocrystal (NC) structures (CdSe core, CdSe/CdS core/shell, and CdSe/CdS/ZnS core/multishell) in the solid film state. For this, a transparent single-walled carbon nanotube ... [Appl. Phys. Lett. 100, 063105 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664534 Tue, 07 Feb 2012 01:07:24 +0100 5664534 Oxygen vacancy segregation and space-charge effects in grain boundaries of dry and hydrated BaZrO http://www.medworm.com/index.php?rid=5664533&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061903%2F1%26agg%3Drss B. Joakim Nyman, Edit E. Helgee, and Goran Wahnstrom A space-charge model is applied to describe the equilibrium effects of segregation of double-donor oxygen vacancies to grain boundaries in dry and wet acceptor-doped samples of the perovskite oxide BaZrO. The grain boundary (GB) core vacancy concentrations and electrostatic potential barriers result ... [Appl. Phys. Lett. 100, 061903 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664533 Tue, 07 Feb 2012 01:07:24 +0100 5664533 Suppression of photoconductivity by magnetic field in epitaxial manganite thin films http://www.medworm.com/index.php?rid=5664532&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061902%2F1%26agg%3Drss E. J. Guo, L. Wang, H. B. Lu, H. Z. Guo, M. He et al. The erasure of photoinduced resistance (PR) by the magnetic field was investigated in manganite films. The PR was significantly suppressed when a magnetic field was introduced at low temperature. The decrease (or increase) of PR with increment of magnetic field was observed in ferromagnetic (or para ... [Appl. Phys. Lett. 100, 061902 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664532 Tue, 07 Feb 2012 01:07:24 +0100 5664532 Entropy change linked to the magnetic field induced Morin transition in Hematite nanoparticles http://www.medworm.com/index.php?rid=5664531&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063102%2F1%26agg%3Drss J. M. Pastor, J. I. Perez-Landazabal, C. Gomez-Polo, V. Recarte, S. Larumbe et al. The most stable form of iron oxide is Hematite (alpha-FeO), which has interesting electronic, catalytic, and magnetic properties showing size dependent characteristics. At room temperature, Hematite is weakly ferromagnetic with a rhombohedral corundum structure. Upon cooling, the structure undergoes ... [Appl. Phys. Lett. 100, 063102 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664531 Tue, 07 Feb 2012 01:07:24 +0100 5664531 Nucleobase adsorbed at graphene devices: Enhance bio-sensorics http://www.medworm.com/index.php?rid=5664530&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063101%2F1%26agg%3Drss Bo Song, Gianaurelio Cuniberti, Stefano Sanvito, and Haiping Fang Graphene as a good material for sensing single small molecules is hardly believed to identify bio-molecules via electrical currents. This is because bio-molecules tend to bind to graphene through non-covalent bonds, such as pi-pi stacking interaction, which is not customarily considered to induce a ... [Appl. Phys. Lett. 100, 063101 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664530 Tue, 07 Feb 2012 01:07:24 +0100 5664530 Twin-Foucault imaging method http://www.medworm.com/index.php?rid=5664529&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061901%2F1%26agg%3Drss Ken Harada (&#x539F;&#x7530;&#x7814;) A method of Lorentz electron microscopy, which enables observation two Foucault images simultaneously by using an electron biprism instead of an objective aperture, was developed. The electron biprism is installed between two electron beams deflected by 180 degrees magnetic domains. Potential appli ... [Appl. Phys. Lett. 100, 061901 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664529 Tue, 07 Feb 2012 01:07:24 +0100 5664529 Spontaneous induction of the uniform lying helix alignment in bimesogenic liquid crystals for the flexoelectro-optic effect http://www.medworm.com/index.php?rid=5664528&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063501%2F1%26agg%3Drss Damian J. Gardiner, Stephen M. Morris, Philip J. W. Hands, Flynn Castles, Malik M. Qasim et al. Using in-plane electric fields, the electrical induction of the uniform lying helix (ULH) alignment in chiral nematic liquid crystals is reported. This process permits spontaneous induction of the ULH alignment to give an in-plane optic axis, without the need for complex processing. Flexoelectro-opt ... [Appl. Phys. Lett. 100, 063501 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664528 Tue, 07 Feb 2012 01:07:24 +0100 5664528 Terahertz magnetic field induced coherent spin precession in YFeO http://www.medworm.com/index.php?rid=5664527&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061102%2F1%26agg%3Drss We present the magnetic dipole transition at 0.299 THz excited by magnetic component of terahertz electromagnetic pulse in an antiferromagnetic YFeO crystal. The impulsive magnetic field of the terahertz pulse tilts the macroscopic magnetization, causing deviation from the equilibrium position, whic ... [Appl. Phys. Lett. 100, 061102 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664527 Tue, 07 Feb 2012 01:07:24 +0100 5664527 Elastomeric silicone substrates for terahertz fishnet metamaterials http://www.medworm.com/index.php?rid=5664526&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F061101%2F1%26agg%3Drss I. E. Khodasevych, C. M. Shah, S. Sriram, M. Bhaskaran, W. Withayachumnankul et al. In this work, we characterize the electromagnetic properties of polydimethylsiloxane (PDMS) and use this as a free-standing substrate for the realization of flexible fishnet metamaterials at terahertz frequencies. Across the 0.22.5 THz band, the refractive index and absorption coefficient of PDMS ar ... [Appl. Phys. Lett. 100, 061101 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664526 Tue, 07 Feb 2012 01:07:24 +0100 5664526 Manganese dioxide modified silicon nanowires and their excellent catalysis in the decomposition of methylene blue http://www.medworm.com/index.php?rid=5664525&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F063104%2F1%26agg%3Drss Weiwei Gao, Mingwang Shao, Li Yang, Shujuan Zhuo, Shiyong Ye et al. A redox between hydrofluoric acid and ammonium fluoride-treated silicon nanowires and potassium permanganate solution was investigated. The results showed that MnO nanoparticles might grow on the surface of silicon nanowires, which was confirmed with the transmission electron microscope. These MnO m ... [Appl. Phys. Lett. 100, 063104 (2012)] published Mon Feb 6, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5664525 Tue, 07 Feb 2012 01:07:24 +0100 5664525 Deep traps in nonpolar m-plane GaN grown by ammonia-based molecular beam epitaxy http://www.medworm.com/index.php?rid=5657043&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051104%2F1%26agg%3Drss Z. Zhang, C. A. Hurni, A. R. Arehart, J. Yang, R. C. Myers et al. Deep level defects in nonpolar m-plane GaN grown by ammonia-based molecular beam epitaxy were characterized using deep level transient spectroscopy (DLTS) and deep level optical spectroscopy (DLOS) and compared with polar c-plane GaN that was grown simultaneously in the same growth run. Significant ... [Appl. Phys. Lett. 100, 051104 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657043 Sat, 04 Feb 2012 01:21:21 +0100 5657043 Recombination mechanisms and band alignment of GaAsBi/GaAs light emitting diodes http://www.medworm.com/index.php?rid=5657042&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051105%2F1%26agg%3Drss N. Hossain, I. P. Marko, S. R. Jin, K. Hild, S. J. Sweeney et al. We investigate the temperature and pressure dependence of the light-current characteristics and electroluminescence spectra of GaAsBi/GaAs light emitting diodes. The temperature dependence of the emission wavelength shows a relatively low temperature coefficient of emission peak shift of 0.19 0.01 ... [Appl. Phys. Lett. 100, 051105 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657042 Sat, 04 Feb 2012 01:21:21 +0100 5657042 Gas refractometry using a hollow-core photonic bandgap fiber in a Mach-Zehnder-type interferometer http://www.medworm.com/index.php?rid=5657041&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051106%2F1%26agg%3Drss We present the design of a fiber-optic gas refractometer that enables spectrally resolved measurements of both real and imaginary parts of the complex refractive index. The proposed concept is based on a Mach-Zehnder-type interferometer with a hollow-core photonic bandgap fiber in one of the interfe ... [Appl. Phys. Lett. 100, 051106 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657041 Sat, 04 Feb 2012 01:21:21 +0100 5657041 Beam-scanning planar lens based on graphene http://www.medworm.com/index.php?rid=5657040&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051903%2F1%26agg%3Drss Hong Ju Xu, Wei Bing Lu, Yun Jiang, and Zheng Gao Dong One of the most important advantages of graphene is the capability of dynamically tuning its conductivity by means of chemical doping or gate voltage. Based on this property, we propose a planar gradient index graphene-based lens transforming spherical waves of the transverse-magnetic (TM) surface p ... [Appl. Phys. Lett. 100, 051903 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657040 Sat, 04 Feb 2012 01:21:21 +0100 5657040 Functional plasma polymers deposited in capacitively and inductively coupled plasmas http://www.medworm.com/index.php?rid=5657039&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051601%2F1%26agg%3Drss Dirk Hegemann, Enrico Korner, Shang Chen, Jan Benedikt, and Achim von Keudell Capacitively and inductively coupled plasmas were investigated in order to deposit functional plasma polymers. Considering plasma chemical and surface processes, comparable films can be obtained with both plasma sources yielding distinctly higher deposition rates for ICP. While the gas phase process ... [Appl. Phys. Lett. 100, 051601 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657039 Sat, 04 Feb 2012 01:21:21 +0100 5657039 Plasma enables edge-to-center-oriented graphene nanoarrays on Si nanograss http://www.medworm.com/index.php?rid=5657038&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053115%2F1%26agg%3Drss S. Kumar, I. Levchenko, Q. J. Cheng, J. Shieh, and K. Ostrikov The formation of clearly separated vertical graphene nanosheets on silicon nanograss support is demonstrated. The plasma-enabled, two-stage mask-free process produced self-organized vertical graphenes of a few carbon layers (as confirmed by advanced microanalysis), prominently oriented in the substr ... [Appl. Phys. Lett. 100, 053115 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657038 Sat, 04 Feb 2012 01:21:21 +0100 5657038 Polarity-dependent photoemission spectra of wurtzite-type zinc oxide http://www.medworm.com/index.php?rid=5657037&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051902%2F1%26agg%3Drss Jesse Williams, Hideki Yoshikawa, Shigenori Ueda, Yoshiyuki Yamashita, Keisuke Kobayashi et al. The polar surfaces of wurtzite-type zinc oxide (ZnO) were characterized by x-ray photoemission spectroscopy to identify the origin of the polarity dependence of the valence band spectra. A characteristic sub-peak always appeared in the valence band spectra of the (0001) face regardless of the surfac ... [Appl. Phys. Lett. 100, 051902 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657037 Sat, 04 Feb 2012 01:21:21 +0100 5657037 Modeling the transport properties of epitaxially grown thermoelectric oxide thin films using spectroscopic ellipsometry http://www.medworm.com/index.php?rid=5657036&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052110%2F1%26agg%3Drss S. R. Sarath Kumar, Anas I. Abutaha, M. N. Hedhili, and H. N. Alshareef The influence of oxygen vacancies on the transport properties of epitaxial thermoelectric (Sr,La)TiO thin films is determined using electrical and spectroscopic ellipsometry (SE) measurements. Oxygen vacancy concentration was varied by ex-situ annealing in Ar and Ar/H. All films exhibited degenerate ... [Appl. Phys. Lett. 100, 052110 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657036 Sat, 04 Feb 2012 01:21:21 +0100 5657036 Electronic transport anisotropy of buckling graphene under uniaxial compressive strain: Ab initio study http://www.medworm.com/index.php?rid=5657035&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052111%2F1%26agg%3Drss Yang Xu, Haiyuan Gao, Huabin Chen, You Yuan, Kaicheng Zhu et al. Electronic transport properties of graphene under uniaxial compressive strain are studied using ab initio calculations. With approximate thermal perturbation, buckling occurs when strain exceeds a threshold, comparing to flat unperturbed structures. Transmissions of flat graphene compressed along zi ... [Appl. Phys. Lett. 100, 052111 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657035 Sat, 04 Feb 2012 01:21:21 +0100 5657035 All-metallic lateral spin valves using CoFe(GeGa) Heusler alloy with a large spin signal http://www.medworm.com/index.php?rid=5657034&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052405%2F1%26agg%3Drss Y. K. Takahashi, S. Kasai, S. Hirayama, S. Mitani, and K. Hono A large spin signal (DeltaR) of 12.8 mOmega at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized CoFe(GeGa) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the lar ... [Appl. Phys. Lett. 100, 052405 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657034 Sat, 04 Feb 2012 01:21:21 +0100 5657034 Mapping the electronic properties of individual graphene grain boundaries http://www.medworm.com/index.php?rid=5657033&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053114%2F1%26agg%3Drss Levente Tapaszto, Peter Nemes-Incze, Gergely Dobrik, Kwon Jae Yoo, Chanyong Hwang et al. Grain boundaries, the characteristic topological defects of chemical vapor deposition grown graphene samples, are expected to substantially alter the electronic properties of the unperturbed graphene lattice. However, there is very little experimental insight into the underlying mechanisms. Here, we ... [Appl. Phys. Lett. 100, 053114 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657033 Sat, 04 Feb 2012 01:21:21 +0100 5657033 Boundary-enhanced momentum relaxation of longitudinal optical phonons in GaN http://www.medworm.com/index.php?rid=5657032&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052109%2F1%26agg%3Drss N. Ma, B. Shen, L. W. Lu, F. J. Xu, L. Guo et al. The influence of the channel geometry on the high-field electron transport properties has been investigated in n-type GaN at room temperature. It is found that electrons in narrow channels drift much faster than those in wide channels. This discrepancy is attributed to the boundary-enhanced momentum ... [Appl. Phys. Lett. 100, 052109 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657032 Sat, 04 Feb 2012 01:21:21 +0100 5657032 Influence of a transverse static magnetic field on the magnetic hyperthermia properties and high-frequency hysteresis loops of ferromagnetic FeCo nanoparticles http://www.medworm.com/index.php?rid=5657031&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052403%2F1%26agg%3Drss B. Mehdaoui, J. Carrey, M. Stadler, A. Cornejo, C. Nayral et al. The influence of a transverse static magnetic field on the magnetic hyperthermia properties is studied on a system of large-losses ferromagnetic FeCo nanoparticles. The simultaneous measurement of the high-frequency hysteresis loops and of the temperature rise provides an interesting insight into th ... [Appl. Phys. Lett. 100, 052403 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657031 Sat, 04 Feb 2012 01:21:21 +0100 5657031 Experimental generation of a radially polarized beam with controllable spatial coherence http://www.medworm.com/index.php?rid=5657030&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051108%2F1%26agg%3Drss Fei Wang, Yangjian Cai, Yiming Dong, and Olga Korotkova We have experimentally generated a radially polarized (RP) beam with controllable state of spatial coherence by using a rotating ground-glass plate and a radial polarization converter. Furthermore, experimental and theoretical analysis of the focusing properties of a partially coherent RP beam is ca ... [Appl. Phys. Lett. 100, 051108 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657030 Sat, 04 Feb 2012 01:21:21 +0100 5657030 Magnetostructural phase transitions and magnetocaloric effects in MnNiGeAl http://www.medworm.com/index.php?rid=5657029&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052404%2F1%26agg%3Drss Tapas Samanta, Igor Dubenko, Abdiel Quetz, Samuel Temple, Shane Stadler et al. The thermomagnetic and magnetocaloric properties of the MnNiGeAl system have been investigated by magnetization and differential scanning calorimetry (DSC) measurements. The presence of first-order magnetostructural transitions (MSTs) from hexagonal ferromagnetic to orthorhombic antiferromagnetic ph ... [Appl. Phys. Lett. 100, 052404 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657029 Sat, 04 Feb 2012 01:21:21 +0100 5657029 Electrical phase transition of poly(4,4[prime]-aminotriphenylene hexafluoroisopropylidenediphthalimide) by photogenerated charged carrier injection http://www.medworm.com/index.php?rid=5657028&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053306%2F1%26agg%3Drss Kyoung-Jae Lee, Dong Min Kim, Kyuwook Ihm, Moonhor Ree, Tai-Hee Kang et al. We show a set-up of poly(4,4[prime]-aminotriphenylene hexafluoroisopropylidenediphthalimide) (6F-TPA PI)/Al sample in which holes are injected by photoelectron emission process instead of direct charge carrier injection via metal electrode. In this process, an irreversible electrical phase transitio ... [Appl. Phys. Lett. 100, 053306 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657028 Sat, 04 Feb 2012 01:21:21 +0100 5657028 Correlation between superconductivity and structural properties under high pressure of iron pnictide superconductor CeYFeAsOF http://www.medworm.com/index.php?rid=5657027&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052601%2F1%26agg%3Drss We report here the pressure dependence of the electrical resistivity and magnetic susceptibility of polycrystalline CeYFeAsOF superconductor in the temperature range 4 K to 300 K up to 8 GPa. In-situ high pressure-low temperature x-ray diffraction was performed at 8 K up to 32 GPa using synchrotron ... [Appl. Phys. Lett. 100, 052601 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657027 Sat, 04 Feb 2012 01:21:21 +0100 5657027 Understanding metal doping for organic electron transport layers http://www.medworm.com/index.php?rid=5657026&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053305%2F1%26agg%3Drss Alexander Mityashin, David Cheyns, Barry P. Rand, and Paul Heremans This work concerns the physical mechanisms of metal n-doping in charge transport layers for optoelectronic devices, for which the doping level is constrained by transparency requirements so as to avoid parasitic absorption. Comparing various metal dopants, we claim that enhanced conductivity at low ... [Appl. Phys. Lett. 100, 053305 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657026 Sat, 04 Feb 2012 01:21:21 +0100 5657026 Optical detection of melting point depression for silver nanoparticles via in situ real time spectroscopic ellipsometry http://www.medworm.com/index.php?rid=5657025&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051107%2F1%26agg%3Drss S. A. Little, T. Begou, R. W. Collins, and S. Marsillac Silver nanoparticle films were deposited by sputtering at room temperature and were annealed while monitoring by real time spectroscopic ellipsometry (SE). The nanoparticle dielectric functions (0.75 eV6.5 eV) obtained by SE were modeled using Lorentz and generalized oscillators for the nanoparticle ... [Appl. Phys. Lett. 100, 051107 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657025 Sat, 04 Feb 2012 01:21:21 +0100 5657025 Effect of the graded electron blocking layer on the emission properties of GaN-based green light-emitting diodes http://www.medworm.com/index.php?rid=5657024&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053504%2F1%26agg%3Drss We report on the effect of a graded AlGaN electron blocking layer (GEBL) on the emission properties of InGaN/GaN multiple quantum wells light-emitting diode (LED). The adoption of GEBL in the LED enhances the electroluminescence intensity and reduces the wavelength blue-shift with increasing injecti ... [Appl. Phys. Lett. 100, 053504 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657024 Sat, 04 Feb 2012 01:21:21 +0100 5657024 Thermally induced secondary atomization of droplet in an acoustic field http://www.medworm.com/index.php?rid=5657023&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F054101%2F1%26agg%3Drss Saptarshi Basu, Abhishek Saha, and Ranganathan Kumar We study the thermal effects that lead to instability and break up in acoustically levitated vaporizing fuel droplets. For selective liquids, atomization occurs at the droplet equator under external heating. Short wavelength [Kelvin-Helmholtz (KH)] instability for diesel and bio-diesel droplets trig ... [Appl. Phys. Lett. 100, 054101 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657023 Sat, 04 Feb 2012 01:21:21 +0100 5657023 ZnS-nanocrystals/polypyrrole nanocomposite film based immunosensor http://www.medworm.com/index.php?rid=5657022&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053701%2F1%26agg%3Drss We report an electrochemically synthesized ZnS nanocrystals modified polypyrrole (PPy) nanocomposite film based immunosensor for the detection of C-reactive protein (alphaCRP). The ZnS-PPy composite film was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and e ... [Appl. Phys. Lett. 100, 053701 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657022 Sat, 04 Feb 2012 01:21:21 +0100 5657022 Erratum: Conversion from unipolar to bipolar resistance switching by inserting TaO layer in Pt/TaO/Pt cells [Appl. Phys. Lett. 98, 183507 (2011)] http://www.medworm.com/index.php?rid=5657021&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F059901%2F1%26agg%3Drss H. K. Yoo, S. B. Lee, J. S. Lee, S. H. Chang, M. J. Yoon et al. Abstract not available. [Appl. Phys. Lett. 100, 059901 (2012)] published Wed Feb 1, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657021 Sat, 04 Feb 2012 01:21:21 +0100 5657021 Time-of-flight-photoelectron emission microscopy on plasmonic structures using attosecond extreme ultraviolet pulses http://www.medworm.com/index.php?rid=5657020&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051904%2F1%26agg%3Drss We report on the imaging of plasmonic structures by time-of-flight-photoemission electron microscopy (ToF-PEEM) in combination with extreme ultraviolet (XUV) attosecond pulses from a high harmonic generation source. Characterization of lithographically fabricated Au structures using these ultrashort ... [Appl. Phys. Lett. 100, 051904 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657020 Sat, 04 Feb 2012 01:21:21 +0100 5657020 Cation stoichiometry optimization of SrTiO (110) thin films with atomic precision in homogeneous molecular beam epitaxy http://www.medworm.com/index.php?rid=5657019&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051602%2F1%26agg%3Drss Zhiming Wang, Jiagui Feng, Yang Yang, Yuan Yao, Lin Gu et al. We study the evolution of surface reconstructions on SrTiO (110) determined by cation concentration ratio and find it detectable by high energy electron diffraction (RHEED) even at high temperature up to 800 degrees C. The evaporation rate of Sr and Ti sources can be calibrated precisely by monitor ... [Appl. Phys. Lett. 100, 051602 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657019 Sat, 04 Feb 2012 01:21:21 +0100 5657019 Magnetic shape memory effect in orbital-spin-coupled system MnVO http://www.medworm.com/index.php?rid=5657018&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051905%2F1%26agg%3Drss Y. Nii, N. Abe, K. Taniguchi, and T. Arima Magnetic-field(H)-induced shape memory effect without temperature variation is demonstrated by a combination of H-sweep and H-rotation in an orbital-spin-coupled spinel-type insulating system MnVO. A rotation of the direction of a magnetic field of 5 T in the low-temperature tetragonal phase gives r ... [Appl. Phys. Lett. 100, 051905 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657018 Sat, 04 Feb 2012 01:21:21 +0100 5657018 Temperature dependent dynamics of ZnO nanoparticles probed by Raman scattering: A big divergence in the functional areas of nanoparticles and bulk materials http://www.medworm.com/index.php?rid=5657017&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051906%2F1%26agg%3Drss Harish Kumar Yadav, R. S. Katiyar, and Vinay Gupta Temperature dependent Raman scattering of the E(low) and E(high) modes of ZnO nanoparticle powder samples has been investigated. The dynamics exhibited by the ZnO nanoparticles, the E modes, follow single crystal like behavior but with strong cubic or/and quadratic anharmonicity by supporting additi ... [Appl. Phys. Lett. 100, 051906 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657017 Sat, 04 Feb 2012 01:21:21 +0100 5657017 Surface depletion mediated control of inter-sub-band absorption in GaAs/AlAs semiconductor quantum well systems http://www.medworm.com/index.php?rid=5657016&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051110%2F1%26agg%3Drss Walter R. Buchwald, Justin W. Cleary, and Joshua Hendrickson The modification of quantum well inter-sub-band absorption properties due to surface depletion induced band bending is reported. Fourier transform infrared spectroscopy measurements of a GaAs/AlAs multiple quantum well system reveal a reduction in the characteristic absorption resonance in correlati ... [Appl. Phys. Lett. 100, 051110 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657016 Sat, 04 Feb 2012 01:21:21 +0100 5657016 Temperature dependence of the intraexcitonic AC Stark effect in semiconductor quantum wells http://www.medworm.com/index.php?rid=5657015&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051109%2F1%26agg%3Drss M. Wagner, M. Teich, M. Helm, and D. Stehr We have investigated the temperature-dependent, intraexcitonic AC Stark effect that manifests itself in a line splitting of the heavy-hole 1s exciton transition in a GaAs/AlGaAs multi quantum well when the 1s-2p intraexciton transition is driven by intense THz light. The observed wavelength-dependen ... [Appl. Phys. Lett. 100, 051109 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657015 Sat, 04 Feb 2012 01:21:21 +0100 5657015 Field-effect devices utilizing LaAlO-SrTiO interfaces http://www.medworm.com/index.php?rid=5657014&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053506%2F1%26agg%3Drss B. Forg, C. Richter, and J. Mannhart Using LaAlO-SrTiO bilayers, we have fabricated field-effect devices that utilize the two-dimensional electron liquid generated at the bilayers' n-type interfaces as drain-source channels and the LaAlO layers as gate dielectrics. With gate voltages well below 1 V, the devices are characterized by vol ... [Appl. Phys. Lett. 100, 053506 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657014 Sat, 04 Feb 2012 01:21:21 +0100 5657014 Pressure-induced changes in the dielectric response of polymer relaxors http://www.medworm.com/index.php?rid=5657013&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052904%2F1%26agg%3Drss B. Hilczer, M. Szafranski, and A. Hilczer The effect of hydrostatic pressure on the dielectric response of P(VDF/TrFE)(50/50) irradiated with fast electrons has been studied. A non-linear upward shift of the glass transition temperature T and the Curie temperature T of the polymer relaxors was observed under pressure with the initial slope ... [Appl. Phys. Lett. 100, 052904 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657013 Sat, 04 Feb 2012 01:21:21 +0100 5657013 Optimal parameters for morphology of bulk heterojunction solar cells from simulations http://www.medworm.com/index.php?rid=5657012&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053307%2F1%26agg%3Drss Junwei Xue, Tingjun Hou, and Youyong Li We combine atomistic simulation with mesoscale simulation to predict the morphology of bulk heterojunction (BHJ) solar cells. We show that good morphology is formed for weight fraction of PCBM in the region of 0.410.62 for poly(3-hexylthiophene)/[6,6]-phenyl-C butyric acid methyl ester BHJ solar cel ... [Appl. Phys. Lett. 100, 053307 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657012 Sat, 04 Feb 2012 01:21:21 +0100 5657012 Observation of conductivity type conversion in undoped ZnO films grown by pulsed laser deposition on silicon (100) substrates http://www.medworm.com/index.php?rid=5657011&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053505%2F1%26agg%3Drss We report a conductivity type conversion of ZnO films from n to p-type for films grown on silicon (100) substrates by pulsed laser deposition under low constant oxygen overpressure. Conductivity conversion is attributed to a competition between donor and acceptor-like native defects correlating with ... [Appl. Phys. Lett. 100, 053505 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657011 Sat, 04 Feb 2012 01:21:21 +0100 5657011 Picosecond transient photoluminescence in high-density Si-nanodisk arrays fabricated using bio-nano-templates http://www.medworm.com/index.php?rid=5657010&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053117%2F1%26agg%3Drss Takayuki Kiba, Yoshiya Mizushima, Makoto Igarashi, Chi-Hsien Huang, Seiji Samukawa et al. We study picosecond transient photoluminescence (PL) in Si-nanodisk (Si-ND) arrays fabricated using bio-nano-templates. The PL time profiles show multi-exponential decaying kinetics depending on the disk density. We attribute the fastest decaying component with a decay time of 40 ps observed only in ... [Appl. Phys. Lett. 100, 053117 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657010 Sat, 04 Feb 2012 01:21:21 +0100 5657010 Negative differential spin conductance in doped zigzag graphene nanoribbons http://www.medworm.com/index.php?rid=5657009&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052112%2F1%26agg%3Drss Ting-Ting Wu, Xue-Feng Wang, Ming-Xing Zhai, Hua Liu, Liping Zhou et al. The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional theory at the local spin density approximation. The current versus voltage curve shows distinguished behaviors for symme ... [Appl. Phys. Lett. 100, 052112 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657009 Sat, 04 Feb 2012 01:21:21 +0100 5657009 Angular distribution of field emitted electrons from vertically aligned carbon nanotube arrays http://www.medworm.com/index.php?rid=5657008&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053116%2F1%26agg%3Drss S. Iacobucci, M. Fratini, A. Rizzo, F. Scarinci, Y. Zhang et al. Angular field emission (FE) properties of vertically aligned carbon nanotube arrays have been measured on samples grown by plasma enhanced chemical vapor deposition and characterized by scanning electron microscope and I-V measurements. These properties determine the angular divergence of electron b ... [Appl. Phys. Lett. 100, 053116 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657008 Sat, 04 Feb 2012 01:21:21 +0100 5657008 Anisotropy and extremely high coercivity in weak ferromagnetic LuFeO http://www.medworm.com/index.php?rid=5657007&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052407%2F1%26agg%3Drss Wenka Zhu, Li Pi, Shun Tan, and Yuheng Zhang The temperature dependence of the structural anisotropy of weak ferromagnetic LuFeO is investigated through the XRD spectra at different temperatures. The structural anisotropy decreases with heating, which is in agreement with the magnetization-temperature measurement. The magnetic hysteresis loops ... [Appl. Phys. Lett. 100, 052407 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657007 Sat, 04 Feb 2012 01:21:21 +0100 5657007 Dipolar ordering of random two-dimensional spin ensemble http://www.medworm.com/index.php?rid=5657006&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052406%2F1%26agg%3Drss Andrey V. Panov We theoretically study the randomly positioned two-dimensional system of interacting magnetic dipoles representing the monolayer arrays of single-domain particles. It is showed the onset of the dipolar in-plane superferromagnetic ordering of Ising spins at the surface concentrations of nanoparticles ... [Appl. Phys. Lett. 100, 052406 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657006 Sat, 04 Feb 2012 01:21:21 +0100 5657006 Long range supercurrents in ferromagnetic CrO using a multilayer contact structure http://www.medworm.com/index.php?rid=5657005&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052602%2F1%26agg%3Drss We report measurements of long ranged supercurrents through ferromagnetic and fully spin-polarized CrO deposited on TiO substrates. In earlier work, we found supercurrents in films grown on sapphire but not on TiO. Here, we employed a special contact arrangement, consisting of a Ni/Cu sandwich betwe ... [Appl. Phys. Lett. 100, 052602 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657005 Sat, 04 Feb 2012 01:21:21 +0100 5657005 The effect of growth temperature of GaAs nucleation layer on InAs/GaAs quantum dots monolithically grown on Ge substrates http://www.medworm.com/index.php?rid=5657004&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052113%2F1%26agg%3Drss T. Wang, A. Lee, F. Tutu, A. Seeds, H. Liu et al. The effect of the growth temperature of the GaAs nucleation layer on the properties of 1.3-[mu]m InAs/GaAs quantum dots (QDs) monolithically grown on a Ge substrate is investigated by using transmission electron microscopy, etch pit density, and photoluminescence (PL) measurements. The photoluminesc ... [Appl. Phys. Lett. 100, 052113 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657004 Sat, 04 Feb 2012 01:21:21 +0100 5657004 Three-dimensional control of Tetrahymena pyriformis using artificial magnetotaxis http://www.medworm.com/index.php?rid=5657003&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053702%2F1%26agg%3Drss Dal Hyung Kim, Paul Seung Soo Kim, Anak Agung Julius, and Min Jun Kim We demonstrate three-dimensional control with the eukaryotic cell Tetrahymena pyriformis (T. pyriformis) using two sets of Helmholtz coils for xy-plane motion and a single electromagnet for z-direction motion. T. pyriformis is modified to have artificial magnetotaxis with internalized magnetite. To ... [Appl. Phys. Lett. 100, 053702 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657003 Sat, 04 Feb 2012 01:21:21 +0100 5657003 Tailoring of electro-optical properties of ferroelectric liquid crystals by doping Pd nanoparticles http://www.medworm.com/index.php?rid=5657002&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F054102%2F1%26agg%3Drss A. Kumar, G. Singh, T. Joshi, G. K. Rao, A. K. Singh et al. We demonstrate here the tailoring of electro-optical properties of ferroelectric liquid crystals (FLCs) by doping different concentrations of Selenium Docosane (SD) capped palladium nanoparticles (PdNPs). The operating voltage is lowered by ~50% in doped FLC as compared to undoped one. The remarkabl ... [Appl. Phys. Lett. 100, 054102 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657002 Sat, 04 Feb 2012 01:21:21 +0100 5657002 High-efficiency thin-film InGaP/InGaAs/Ge tandem solar cells enabled by controlled spalling technology http://www.medworm.com/index.php?rid=5657001&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053901%2F1%26agg%3Drss D. Shahrjerdi, S. W. Bedell, C. Ebert, C. Bayram, B. Hekmatshoar et al. In this letter, we demonstrate the effectiveness of the controlled spalling technology for producing high-efficiency (28.7%) thin-film InGaP/(In)GaAs/Ge tandem solar cells. The controlled spalling technique was employed to separate the as-grown solar cell structure from the host Ge wafer followed by ... [Appl. Phys. Lett. 100, 053901 (2012)] published Thu Feb 2, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657001 Sat, 04 Feb 2012 01:21:21 +0100 5657001 Strong interband transitions in InAs quantum dots solar cell http://www.medworm.com/index.php?rid=5657000&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051907%2F1%26agg%3Drss Jiang Wu, Y. F. M. Makableh, R. Vasan, M. O. Manasreh, B. Liang et al. Solar cells fabricated from a stack of ten periods of InAs quantum dots sandwiched in a GaAs p-n junction were fabricated and tested. The 300 K photoresponse spectrum exhibits two strong peaks and several weak peaks related to band-to-band transitions within the quantum dots. A few of these peaks we ... [Appl. Phys. Lett. 100, 051907 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5657000 Sat, 04 Feb 2012 01:21:21 +0100 5657000 Fabrication of flower-like silver nanostructure on the Al substrate for surface enhanced fluorescence http://www.medworm.com/index.php?rid=5656999&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051112%2F1%26agg%3Drss Jun Dong (&#x8463;&#x519B;), Hairong Zheng (&#x90D1;&#x6D77;&#x8363;), Xiaoqing Yan, Yu Sun, and Zhenglong Zhang Surface-enhanced fluorescence (SEF) substrates consisting of flower-like nanostructure of electromagnetically coupled silver dendrites on Al surface were manufactured by modified galvanic displacement process between Ag ion and Al at room temperature. Substrate enhancement efficiency, which was eval ... [Appl. Phys. Lett. 100, 051112 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656999 Sat, 04 Feb 2012 01:21:21 +0100 5656999 A quantum model for light emission performance of carbon nanotube field effect transistor http://www.medworm.com/index.php?rid=5656998&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051113%2F1%26agg%3Drss M. R. Aziziyan, V. Ahmadi, and N. Moghadam We propose a full quantum model based on non-equilibrium Green function method to simulate short channel, ohmic-carbon nanotube field effect transistor as light emitter. We consider carrier annihilation using self-energy concept in non-ballistic regime, regarding current conservation. Using this mod ... [Appl. Phys. Lett. 100, 051113 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656998 Sat, 04 Feb 2012 01:21:21 +0100 5656998 Improvement of coercivity and thermal stability of anisotropic NdFeBNbGa powders by diffusion of Pr-Cu alloys http://www.medworm.com/index.php?rid=5656997&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052409%2F1%26agg%3Drss Zhong Lin, Jingzhi Han, Meiying Xing, Shunquan Liu, Rui Wu et al. Highly anisotropic NdFeBNbGa powders from a self-organized rod-like disproportionation microstructure and room temperature magnetic properties of [mu]M = 1.4 T, H = 13 kOe, and (BH) = 41 MGOe are obtained by optimizing hydrogenation disproportionation desorption recombination (HDDR) process. Diffusi ... [Appl. Phys. Lett. 100, 052409 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656997 Sat, 04 Feb 2012 01:21:21 +0100 5656997 A transparent 90 degrees polarization rotator by combining chirality and electromagnetic wave tunneling http://www.medworm.com/index.php?rid=5656996&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051909%2F1%26agg%3Drss Mehmet Mutlu and Ekmel Ozbay A three-layer chiral metamaterial is constructed by using two layers of four mutually rotated resonators and a subwavelength mesh sandwiched symmetrically between these layers. The resulting structure is an ultrathin, transparent, and polarization angle independent 90 degrees polarization rotator. ... [Appl. Phys. Lett. 100, 051909 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656996 Sat, 04 Feb 2012 01:21:21 +0100 5656996 Multiferroic phase competitions in perovskite manganite thin films http://www.medworm.com/index.php?rid=5656995&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052410%2F1%26agg%3Drss M. H. Qin, Y. M. Tao, M. Zeng, X. S. Gao, S. J. Wu et al. Based on the Mochizuki-Furukawa model, the cycloidal spin structures of orthorhombic RMnO manganite thin films on various magnetic substrates are simulated using Monte Carlo method. It is revealed that the long range cycloidal spin order can be modulated by the film thickness and substrate spin stru ... [Appl. Phys. Lett. 100, 052410 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656995 Sat, 04 Feb 2012 01:21:21 +0100 5656995 Deep traps in nonpolar m-plane GaN grown by ammonia-based molecular beam epitaxy http://www.medworm.com/index.php?rid=5656994&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052114%2F1%26agg%3Drss Z. Zhang, C. A. Hurni, A. R. Arehart, J. Yang, R. C. Myers et al. Deep level defects in nonpolar m-plane GaN grown by ammonia-based molecular beam epitaxy were characterized using deep level transient spectroscopy (DLTS) and deep level optical spectroscopy (DLOS) and compared with polar c-plane GaN that was grown simultaneously in the same growth run. Significant ... [Appl. Phys. Lett. 100, 052114 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656994 Sat, 04 Feb 2012 01:21:21 +0100 5656994 Standoff detection via single-beam spectral notch filtered pulses http://www.medworm.com/index.php?rid=5656993&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051111%2F1%26agg%3Drss Adi Natan, Jonathan M. Levitt, Leigh Graham, Ori Katz, and Yaron Silberberg We demonstrate single-beam coherent anti-Stokes Raman spectroscopy (CARS), for detecting and identifying traces of solids, including minute amounts of explosives, from a standoff distance (>50 m) using intense femtosecond pulses. Until now, single-beam CARS methods relied on pulse-shapers in order t ... [Appl. Phys. Lett. 100, 051111 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656993 Sat, 04 Feb 2012 01:21:21 +0100 5656993 Thermal conductivity and photoluminescence of light-emitting silicon nitride films http://www.medworm.com/index.php?rid=5656992&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051908%2F1%26agg%3Drss Amy Marconnet, Matt Panzer, Selcuk Yerci, Salvatore Minissale, X. Wang et al. Silicon-rich and rare-earth-doped nitride materials are promising candidates for silicon-compatible photonic sources. This work investigates the thermal conductivity and photoluminescence (PL) of light emitting samples fabricated with a range of excess silicon concentrations and annealing temperatur ... [Appl. Phys. Lett. 100, 051908 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656992 Sat, 04 Feb 2012 01:21:21 +0100 5656992 Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers http://www.medworm.com/index.php?rid=5656991&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052411%2F1%26agg%3Drss R. Lavrijsen, A. Fernandez-Pacheco, D. Petit, R. Mansell, J. H. Lee et al. We experimentally study the tunability of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interlayer exchange coupling (IEC) in Pt/CoFeB/Pt/Ru/Pt/CoFeB/Pt stacks with perpendicular magnetic anisotropy (PMA). The perpendicular magnetization of a single Pt/CoFeB/Pt (at. %) shows full remanence and square hys ... [Appl. Phys. Lett. 100, 052411 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656991 Sat, 04 Feb 2012 01:21:21 +0100 5656991 Anisotropic magnetoresistance and weak spin-orbital coupling in doped ZnO thin films http://www.medworm.com/index.php?rid=5656990&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052408%2F1%26agg%3Drss Yufeng Tian, Weinan Lin, and Tom Wu Both out-of-plane and in-plane anisotropic magnetoresistance (AMR) of Cu-doped ZnO thin films with different crystalline orientations are studied. Comparative data of angular dependent AMR suggest that the out-of-plane AMR comes from the geometric effect, while the in-plane AMR can be attributed to ... [Appl. Phys. Lett. 100, 052408 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656990 Sat, 04 Feb 2012 01:21:21 +0100 5656990 Enhancement of critical heat flux in pool boiling using atomic layer deposition of alumina http://www.medworm.com/index.php?rid=5656989&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053120%2F1%26agg%3Drss Bo Feng, Keith Weaver, and G. P. Peterson Alumina nano coatings on platinum (Pt) micro wires were fabricated using atomic layer deposition. During the pool boiling heat transfer, the critical heat flux (CHF) of Pt/Alumina in de-ionized water was found to have a two-fold enhancement compared to that of the same Pt bare wire. The CHF was show ... [Appl. Phys. Lett. 100, 053120 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656989 Sat, 04 Feb 2012 01:21:21 +0100 5656989 Light-driven tunable dual-band plasmonic absorber using liquid-crystal-coated asymmetric nanodisk array http://www.medworm.com/index.php?rid=5656988&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053119%2F1%26agg%3Drss Yanhui Zhao, Qingzhen Hao, Yi Ma, Mengqian Lu, Bingxin Zhang et al. We experimentally demonstrated a light-driven reconfigurable near perfect plasmonic absorber working at dual frequencies in infrared range. By employing nanodisks with different sizes in certain arrangement, near perfect absorption of incident electromagnetic waves can be achieved for different work ... [Appl. Phys. Lett. 100, 053119 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656988 Sat, 04 Feb 2012 01:21:21 +0100 5656988 Cumulative effects of electrode and dielectric surface modifications on pentacene-based transistors http://www.medworm.com/index.php?rid=5656987&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053308%2F1%26agg%3Drss Melanie Devynck, Pascal Tardy, Guillaume Wantz, Yohann Nicolas, Luc Vellutini et al. Surface modifications of the dielectric and the metal of pentacene-based field effect transistors using self-assembled monolayer (SAM) were studied. First, a low interfacial trap density and pentacene 2D-growth were favored by the nonpolar and low surface energy of octadecyltrichlorosilane-based SAM ... [Appl. Phys. Lett. 100, 053308 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656987 Sat, 04 Feb 2012 01:21:21 +0100 5656987 Effect of overgrowth temperature on the mid-infrared response of Ge/Si(001) quantum dots http://www.medworm.com/index.php?rid=5656986&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053507%2F1%26agg%3Drss A. I. Yakimov, A. A. Bloshkin, V. A. Timofeev, A. I. Nikiforov, and A. V. Dvurechenskii Ge/Si quantum dots fabricated by molecular-beam epitaxy at 500 degrees C are overgrown with Si at different temperatures T, and their mid-infrared photoresponse is investigated. The photocurrent maximum shifts from 2.3 to 3.9 [mu]m with increasing T from 300 to 750 degrees C. The best performance ... [Appl. Phys. Lett. 100, 053507 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656986 Sat, 04 Feb 2012 01:21:21 +0100 5656986 Investigation of proximity effects in electron microscopy and lithography http://www.medworm.com/index.php?rid=5656985&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053118%2F1%26agg%3Drss M.-M. Walz, F. Vollnhals, F. Rietzler, M. Schirmer, H.-P. Steinruck et al. A fundamental challenge in lithographic and microscopic techniques employing focused electron beams are so-called proximity effects due to unintended electron emission and scattering in the sample. Herein, we apply a method that allows for visualizing electron induced surface modifications on a SiN ... [Appl. Phys. Lett. 100, 053118 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656985 Sat, 04 Feb 2012 01:21:21 +0100 5656985 Cross-linking of a poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) hole injection layer with a bis-azide salt and the effect of atmospheric processing conditions on device properties http://www.medworm.com/index.php?rid=5656984&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053309%2F1%26agg%3Drss Oliver Fenwick, Kate Oliver, and Franco Cacialli We investigate the role of atmospheric conditions during processing when cross-linking a poly(3,4-ethylene dioxythiophene):(polystyrene sulfonic acid) hole injection layer with a bis-azide salt. In particular, we investigate nitrogen atmosphere and air, since there is a competing reaction of the cro ... [Appl. Phys. Lett. 100, 053309 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656984 Sat, 04 Feb 2012 01:21:21 +0100 5656984 Correlations between the thermal vibrations of two cantilevers: Validation of deterministic analysis via the fluctuation-dissipation theorem http://www.medworm.com/index.php?rid=5656983&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053121%2F1%26agg%3Drss Christopher D. F. Honig, Milad Radiom, Brian A. Robbins, John Y. Walz, Mark R. Paul et al. We validate a theoretical approach for analyzing correlations in the fluctuations of two cantilevers in terms of a deterministic model, using the fluctuation-dissipation theorem [M. R. Paul and M. C. Cross, Phys. Rev. Lett. 92, 235501 (2004)]. The validation has been made possible through measuremen ... [Appl. Phys. Lett. 100, 053121 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656983 Sat, 04 Feb 2012 01:21:21 +0100 5656983 Suppressed indium diffusion and enhanced absorption in InGaAs/GaAsP stepped quantum well solar cell http://www.medworm.com/index.php?rid=5656982&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053902%2F1%26agg%3Drss Yu Wen, Yunpeng Wang, and Yoshiaki Nakano A multiple stepped quantum well (MSQW) structure, in which GaAs step layers are sandwiched between strain-balanced InGaAs wells and GaAsP barriers, has been proposed and improvements in sub-GaAs-bandgap QE have been demonstrated. We have studied the effect of indium diffusion on the optical properti ... [Appl. Phys. Lett. 100, 053902 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656982 Sat, 04 Feb 2012 01:21:21 +0100 5656982 Publisher's Note: Dramatic thermal conductivity reduction by nanostructures for large increase in thermoelectric figure-of-merit of FeSb [Appl. Phys. Lett. 99, 163101 (2011)] http://www.medworm.com/index.php?rid=5656981&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F059902%2F1%26agg%3Drss Huaizhou Zhao, Mani Pokharel, Gaohua Zhu, Shuo Chen, Kevin Lukas et al. Abstract not available. [Appl. Phys. Lett. 100, 059902 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656981 Sat, 04 Feb 2012 01:21:21 +0100 5656981 Role of deep and shallow donor levels on n-type conductivity of hydrothermal ZnO http://www.medworm.com/index.php?rid=5656980&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052115%2F1%26agg%3Drss S. Brochen, C. Granier, G. Feuillet, and J. Pernot The residual n-type conductivity of O-polar hydrothermally grown ZnO single crystals and the role of annealing on the transport properties are assessed by temperature dependent Hall measurements on a wide 20800 K temperature range. A deep level lying 250 meV below the conduction band is responsible ... [Appl. Phys. Lett. 100, 052115 (2012)] published Fri Feb 3, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5656980 Sat, 04 Feb 2012 01:21:21 +0100 5656980 Position-controlled [100] InP nanowire arrays http://www.medworm.com/index.php?rid=5644150&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053107%2F1%26agg%3Drss Jia Wang, Sebastien Plissard, Moira Hocevar, Thuy T. T. Vu, Tilman Zehender et al. We investigate the growth of vertically standing [100] zincblende InP nanowire (NW) arrays on InP (100) substrates in the vapor-liquid-solid growth mode using low-pressure metal-organic vapor-phase epitaxy. Precise positioning of these NWs is demonstrated by electron beam lithography. The vertical N ... [Appl. Phys. Lett. 100, 053107 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644150 Tue, 31 Jan 2012 19:49:42 +0100 5644150 Mechanisms of nanorod growth on focused-ion-beam-irradiated semiconductor surfaces: Role of redeposition http://www.medworm.com/index.php?rid=5644149&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053103%2F1%26agg%3Drss J. H. Wu and R. S. Goldman We have examined the formation and evolution of irradiation-induced nanorod (NR) growth through a comparison of focused-ion-beam irradiation of InSb wafers and InSb/GaAs heterostructures. Above a critical ion dose, cone-shaped NRs capped with In islands form on both InSb surfaces. For InSb wafers, t ... [Appl. Phys. Lett. 100, 053103 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644149 Tue, 31 Jan 2012 19:49:42 +0100 5644149 High-temperature annealing of thin Au films on Si: Growth of SiO nanowires or Au dendritic nanostructures? http://www.medworm.com/index.php?rid=5644148&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053102%2F1%26agg%3Drss F. Ruffino, L. Romano, G. Pitruzzello, and M. G. Grimaldi A simple and low-cost approach for the large-scale production of Au nanodendritic structures on Si is presented. Starting from the methodology involving deposition of a Au film on Si and heating the system to high temperatures in an inert ambient containing trace amounts of oxygen for the growth of ... [Appl. Phys. Lett. 100, 053102 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644148 Tue, 31 Jan 2012 19:49:42 +0100 5644148 Room-temperature single molecular memory http://www.medworm.com/index.php?rid=5644147&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053101%2F1%26agg%3Drss Shinya Kano, Yasuyuki Yamada, Kentaro Tanaka, and Yutaka Majima Single molecular memory operation was observed on a porphyrin derivative by scanning tunneling microscopy at room temperature. A porphyrin derivative with four disulfide groups was chemically synthesized and chemisorbed on a Au(111) surface. Coulomb blockade behaviors and switching behaviors in curr ... [Appl. Phys. Lett. 100, 053101 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644147 Tue, 31 Jan 2012 19:49:42 +0100 5644147 Calculation of self-diffusion coefficients in diamond http://www.medworm.com/index.php?rid=5644146&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051901%2F1%26agg%3Drss Baohua Zhang and Xiaoping Wu In the light of recently reported pressure-volume-temperature relationships in diamond, we show that the self-diffusion coefficient of diamond as a function of temperature and pressure can be satisfactory reproduced in terms of the bulk elastic and expansivity data by means of a thermodynamical mode ... [Appl. Phys. Lett. 100, 051901 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644146 Tue, 31 Jan 2012 19:49:42 +0100 5644146 Pulsed contact resonance for atomic force microscopy nanomechanical measurements http://www.medworm.com/index.php?rid=5644145&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053104%2F1%26agg%3Drss Jason P. Killgore and Donna C. Hurley We demonstrate an improved technique for nanomechanical imaging in atomic force microscopy. By merging the sensitivity to contact stiffness inherent to contact resonance (CR) spectroscopy with the delicate nature and potential for adhesion data of pulsed-force mode, we address major shortcomings of ... [Appl. Phys. Lett. 100, 053104 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644145 Tue, 31 Jan 2012 19:49:42 +0100 5644145 Transition-metal doping of small cadmium selenide clusters http://www.medworm.com/index.php?rid=5644144&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053105%2F1%26agg%3Drss Tejinder Singh, T. J. Mountziaris, and Dimitrios Maroudas Using first-principles density functional theory calculations, we investigate the mechanism of Mn doping of colloidal CdSe nanocrystals. We find that Mn dopants have high binding energies for adsorption onto the sites of small CdSe clusters (with diameters d < 2 nm) as compared to those for adsorpti ... [Appl. Phys. Lett. 100, 053105 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644144 Tue, 31 Jan 2012 19:49:42 +0100 5644144 Theoretical approach to evaluating beryllium oxide as a gate dielectric considering electromagnetics and thermal stability http://www.medworm.com/index.php?rid=5644143&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053501%2F1%26agg%3Drss J. H. Yum, G. Bersuker, J. Oh, and S. K. Banerjee The effectiveness of an atomic layer deposited beryllium oxide (BeO) barrier layer has been investigated through physical and electrical analysis as a way to control the interfacial layer on Si and III-V substrates recently. In this paper, a theoretical model is suggested to find the most promising ... [Appl. Phys. Lett. 100, 053501 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644143 Tue, 31 Jan 2012 19:49:42 +0100 5644143 Growth and photoluminescence of self-catalyzed GaP/GaNP core/shell nanowires on Si(111) by gas source molecular beam epitaxy http://www.medworm.com/index.php?rid=5644142&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053108%2F1%26agg%3Drss We report a study on self-catalyzed GaP/GaNP core/shell nanowires (NWs) grown on Si(111) by gas-source molecular beam epitaxy. Scanning electron microscopy images show that vertical and uniform GaP NWs and GaP/GaNP core/shell NWs are grown on Si(111). The density ranges from ~1 x 10 to ~5 x 10cm ... [Appl. Phys. Lett. 100, 053108 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644142 Tue, 31 Jan 2012 19:49:42 +0100 5644142 Piezoelectric single crystal langatate and ferromagnetic composites: Studies on low-frequency and resonance magnetoelectric effects http://www.medworm.com/index.php?rid=5644141&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052901%2F1%26agg%3Drss G. Sreenivasulu, L. Y. Fetisov, Y. K. Fetisov, and G. Srinivasan Mechanical strain mediated magnetoelectric (ME) effects are studied in bilayers and trilayers of piezoelectric single-crystal lanthanum gallium tantalate (LGT) and magnetostrictive permendur (P). The ME voltage coefficient ranges from 2.3 V/cm Oe at 20 Hz to 720 V/cm Oe at bending resonance and is h ... [Appl. Phys. Lett. 100, 052901 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644141 Tue, 31 Jan 2012 19:49:42 +0100 5644141 Distributed Bragg reflectors based on diluted boron-based BAlN alloys for deep ultraviolet optoelectronic applications http://www.medworm.com/index.php?rid=5644140&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051101%2F1%26agg%3Drss M. Abid, T. Moudakir, G. Orsal, S. Gautier, A. En Naciri et al. Highly reflective deep UV distributed Bragg reflectors (DBRs) based on the BAlN material system have been grown by metalorganic vapour phase epitaxy on AlN template substrates. These structures make use of the transparency of BAlN in the deep UV and the high refractive index contrast between BAlN an ... [Appl. Phys. Lett. 100, 051101 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644140 Tue, 31 Jan 2012 19:49:42 +0100 5644140 Comparison of scanning tunneling microscope-light emission and photoluminescence from porphyrin films using ultra-high vacuum scanning tunneling microscopy http://www.medworm.com/index.php?rid=5644139&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051102%2F1%26agg%3Drss Ryusuke Nishitani, Hongwen Liu, and Hiroshi Iwasaki In order to study the interaction between molecules and photon fields, including plasmonic and external laser fields, we have carried out in situ measurements of photoluminescence (PL) from porphyrin molecules on Au substrates with and without a scanning tunneling microscope (STM) tip. Measurements ... [Appl. Phys. Lett. 100, 051102 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644139 Tue, 31 Jan 2012 19:49:42 +0100 5644139 Non-ideal energy selective contacts and their effect on the performance of a hot carrier solar cell with an indium nitride absorber http://www.medworm.com/index.php?rid=5644138&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053502%2F1%26agg%3Drss Y. Feng, P. Aliberti, B. P. Veettil, R. Patterson, S. Shrestha et al. The hot carrier solar cell is a third generation photovoltaic device that extracts photo-generated carriers before they thermalise. In this work, the efficiency of a hot carrier solar cell with a 50 nm indium nitride (InN) absorber layer has been calculated, taking into account the realistic transpo ... [Appl. Phys. Lett. 100, 053502 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644138 Tue, 31 Jan 2012 19:49:42 +0100 5644138 Quantum Hall effect in bottom-gated epitaxial graphene grown on the C-face of SiC http://www.medworm.com/index.php?rid=5644137&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052102%2F1%26agg%3Drss B. Jouault, N. Camara, B. Jabakhanji, A. Caboni, C. Consejo et al. We demonstrate that the carrier concentration of epitaxial graphene devices grown on the C-face of a SiC substrate is efficiently modulated by a buried gate. The gate is fabricated via the implantation of nitrogen atoms in the SiC crystal. The charge neutrality point is observed close to gate voltag ... [Appl. Phys. Lett. 100, 052102 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644137 Tue, 31 Jan 2012 19:49:42 +0100 5644137 Effect of electric field on the band structure of graphene/boron nitride and boron nitride/boron nitride bilayers http://www.medworm.com/index.php?rid=5644136&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052104%2F1%26agg%3Drss Radhakrishnan Balu, Xiaoliang Zhong, Ravindra Pandey, and Shashi P. Karna Effect of electric field on the band structures of graphene/boron nitride (BN) and BN/BN bilayers is investigated within the framework of density functional theory. The calculated bandgap of the graphene/BN bilayer increases, although by small amount, with applied electric field. In the case of BN/B ... [Appl. Phys. Lett. 100, 052104 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644136 Tue, 31 Jan 2012 19:49:42 +0100 5644136 Magnetodielectric effects of YFeTiO ceramics http://www.medworm.com/index.php?rid=5644135&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052902%2F1%26agg%3Drss Y. J. Wu, C. Yu, X. M. Chen, and J. Li Dielectric, magnetic, and magnetodielectric properties of YFeTiO (x = 0, 0.1, 0.2) ceramics were investigated. Ti substitution induces a low temperature dielectric relaxation which comes from the charge carrier hopping between Ti and Ti. The Maxwell-Wagner effect related dielectric relaxation become ... [Appl. Phys. Lett. 100, 052902 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644135 Tue, 31 Jan 2012 19:49:42 +0100 5644135 Spoof-like plasmonic behavior of plasma enhanced atomic layer deposition grown Ag thin films http://www.medworm.com/index.php?rid=5644134&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053106%2F1%26agg%3Drss S. M. Prokes, O. J. Glembocki, Erin Cleveland, Josh D. Caldwell, Edward Foos et al. The plasmonic behavior of Ag thin films produced by plasma enhanced atomic layer deposition (PEALD) has been investigated. We show that as-deposited flat PEALD Ag films exhibit unexpected plasmonic properties, and the plasmonic enhancement can differ markedly, depending on the microstructure of the ... [Appl. Phys. Lett. 100, 053106 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644134 Tue, 31 Jan 2012 19:49:42 +0100 5644134 Influence of charge compensation mechanisms on the sheet electron density at conducting LaAlO/SrTiO-interfaces http://www.medworm.com/index.php?rid=5644133&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052103%2F1%26agg%3Drss F. Gunkel, P. Brinks, S. Hoffmann-Eifert, R. Dittmann, M. Huijben et al. The equilibrium conductance of LaAlO/SrTiO (LAO/STO)-heterointerfaces was investigated at high temperatures (950 K-1100 K) as a function of ambient oxygen partial pressure (pO). Metallic LAO/STO-interfaces were obtained for LAO grown on STO single crystals as well as on STO-buffered (La,Sr)(Al,Ta)O ... [Appl. Phys. Lett. 100, 052103 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644133 Tue, 31 Jan 2012 19:49:42 +0100 5644133 Fabrication and characterization of ambipolar devices on an undoped AlGaAs/GaAs heterostructure http://www.medworm.com/index.php?rid=5644132&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052101%2F1%26agg%3Drss J. C. H. Chen, D. Q. Wang, O. Klochan, A. P. Micolich, K. Das Gupta et al. We have fabricated AlGaAs/GaAs heterostructure devices in which the conduction channel can be populated with either electrons or holes simply by changing the polarity of a gate bias. The heterostructures are entirely undoped, and carriers are, instead, induced electrostatically. We use these devices ... [Appl. Phys. Lett. 100, 052101 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644132 Tue, 31 Jan 2012 19:49:42 +0100 5644132 Short circuit current improvement in planar heterojunction organic solar cells by multijunction charge transfer http://www.medworm.com/index.php?rid=5644131&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053301%2F1%26agg%3Drss J. C. Wang, S. Q. Shi, C. W. Leung, S. P. Lau, K. Y. Wong et al. A multijunction structure was applied on an organic photovoltaic (OPV) device for broadening the absorption spectrum and enhancing the power conversion efficiency through charge transfer process. By inserting the tris[4-(2-thienyl)]amine (TTPA) into a boron subphthalocyanine chloride (SubPc)/C OPV d ... [Appl. Phys. Lett. 100, 053301 (2012)] published Mon Jan 30, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644131 Tue, 31 Jan 2012 19:49:42 +0100 5644131 2-bit operation based on modulated Fowler-Nordheim tunneling in charge-trapping flash memory cell http://www.medworm.com/index.php?rid=5644130&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052107%2F1%26agg%3Drss Min-Feng Hung, Yung-Chun Wu, and Jiang-Hung Chen This work proposes a spatially charge tunneling method for program/erase (P/E) based on the drain-modulated Fowler-Nordheim (MFN) tunneling in a polycrystalline silicon channel charge-trap type flash memory device. The program mechanism and the simulation of the MFN are discussed. 2-bit operations b ... [Appl. Phys. Lett. 100, 052107 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644130 Tue, 31 Jan 2012 19:49:42 +0100 5644130 Growth and valence band offset measurement of PbTe/InSb heterojunctions http://www.medworm.com/index.php?rid=5644129&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052108%2F1%26agg%3Drss Kyoung-Keun Lee, Weerasinghe Priyantha, and Thomas H. Myers InSb (111)B and (211)B substrates were investigated for the growth of PbTe. The PbTe/InSb (111)B showed slip features caused by stain relaxation during cooling down, while growth of PbTe/InSb (211)B resulted in a better surface morphology. The valence band offset of PbTe/InSb (211)B was measured by ... [Appl. Phys. Lett. 100, 052108 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644129 Tue, 31 Jan 2012 19:49:42 +0100 5644129 Ultrathin crystalline-silicon solar cells with embedded photonic crystals http://www.medworm.com/index.php?rid=5644128&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053113%2F1%26agg%3Drss Shrestha Basu Mallick, Mukul Agrawal, Artit Wangperawong, Edward S. Barnard, Kaushal K. Singh et al. Photonic crystals (PCs) can be used to trap light in thin-film solar cells to increase optical absorption. We fabricated ultrathin c-Si solar cells whose active layer was patterned into a two-dimensional PC with a square lattice of 450 nm diameter holes spaced at a period of 750 nm. The PC couples i ... [Appl. Phys. Lett. 100, 053113 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644128 Tue, 31 Jan 2012 19:49:42 +0100 5644128 From mesoscopic to global polar order in the uniaxial relaxor ferroelectric SrBaNbO http://www.medworm.com/index.php?rid=5644127&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052903%2F1%26agg%3Drss J. Dec, W. Kleemann, V. V. Shvartsman, D. C. Lupascu, and T. Lukasiewicz In the relaxor ferroelectric SrBaNbO (SBN80) the relaxation of polar nanoregions (PNRs) reveals an anisotropic breathing mode when approaching the transition temperature, T [approximate] 289 K, on cooling. Two distinct dispersion steps and peaks, respectively, of the complex susceptibility component ... [Appl. Phys. Lett. 100, 052903 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644127 Tue, 31 Jan 2012 19:49:42 +0100 5644127 Itinerant ferromagnetism and geometrically suppressed metal-insulator transition in epitaxial thin films of CaRuO http://www.medworm.com/index.php?rid=5644126&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052401%2F1%26agg%3Drss Ludi Miao, Punam Silwal, Xiaolan Zhou, Ilan Stern, Jin Peng et al. We have investigated the effect of epitaxial strain on the electrical and magnetic properties of high quality CaRuO films on LaAlO (001) substrates. The films exhibit low temperature itinerant ferromagnetic ground state and significantly suppressed metal-insulator transition due to epitaxial strain. ... [Appl. Phys. Lett. 100, 052401 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644126 Tue, 31 Jan 2012 19:49:42 +0100 5644126 Self-driving capacitive cantilevers for high-frequency atomic force microscopy http://www.medworm.com/index.php?rid=5644125&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053110%2F1%26agg%3Drss Keith A. Brown, Benjamin H. Yang, and R. M. Westervelt We demonstrate a simple way to actuate an atomic force microscope cantilever at high frequencies by electrically driving a thin-film capacitor on its surface. Capacitive driving directly actuates the vibrational mode of the cantilever, removing the effects of unwanted mechanical modes present in con ... [Appl. Phys. Lett. 100, 053110 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644125 Tue, 31 Jan 2012 19:49:42 +0100 5644125 Tapping-mode force spectroscopy using cantilevers with interferometric high-bandwidth force sensors http://www.medworm.com/index.php?rid=5644124&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053109%2F1%26agg%3Drss A. Fatih Sarioglu, Sergei Magonov, and Olav Solgaard We quantitatively map the surface forces and elastic modulus in tapping-mode atomic force microscopy (AFM). To achieve this, we use custom-built cantilevers with interferometric high-bandwidth force sensors that can resolve nonlinear tip-sample interaction forces, combined with a set of algorithms t ... [Appl. Phys. Lett. 100, 053109 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644124 Tue, 31 Jan 2012 19:49:42 +0100 5644124 Fabrication and magnetic properties of free-standing Ni nanotube arrays with controllable wall thickness http://www.medworm.com/index.php?rid=5644123&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052402%2F1%26agg%3Drss Y. L. Li, S. L. Tang, R. Xie, Y. Wang, M. Yang et al. Free-standing Ni nanotubes were fabricated on silicon substrate using anodic aluminum oxide/polypyrrole composite template. The diameter, length, and wall thickness of the nanotubes can be precisely and independently controlled. Magnetic measurements show that the magnetic anisotropic properties are ... [Appl. Phys. Lett. 100, 052402 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644123 Tue, 31 Jan 2012 19:49:42 +0100 5644123 Spin transport in poly(metalarenylsilane) http://www.medworm.com/index.php?rid=5644122&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053303%2F1%26agg%3Drss Yukihito Matsuura We focused on the spin transport properties of polymers containing ferrocene and the related transition-metal-benzene sandwich compound (metal = Cr and V) with a silicon bridge such as poly(ferrocenylsilane) and poly(metalarenylsilane). As a model system, a sulfur-substituted oligomer was put on gol ... [Appl. Phys. Lett. 100, 053303 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644122 Tue, 31 Jan 2012 19:49:42 +0100 5644122 Pseudobinary AlTe-SbTe material for high speed phase change memory application http://www.medworm.com/index.php?rid=5644121&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052105%2F1%26agg%3Drss Kun Ren, Feng Rao, Zhitang Song, Shilong Lv, Yan Cheng et al. AlSbTe is a pseudobinary material constructed by SbTe (fast crystallization speed but thermally unstable) and AlTe (thermally stable but without memory switching ability). AlSbTe material possesses advantages of these two binary compounds showing good memory switching ability with fast switching spe ... [Appl. Phys. Lett. 100, 052105 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644121 Tue, 31 Jan 2012 19:49:42 +0100 5644121 Unipolar depletion-load organic circuits on flexible substrate by self-organized polymer blending with 6, 13-bis(triisopropylsilylethynyl)pentacene using ink-jet printing http://www.medworm.com/index.php?rid=5644120&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053302%2F1%26agg%3Drss We report the threshold voltage control and its application to electronic circuits of ink-jet printed organic thin-film transistors (OTFTs) with self-organized process using 6, 13-bis(triisopropylsilyl-ethynyl)pentacene (TIPS-pentacene) and insulating polymer on plastic substrate. The threshold volt ... [Appl. Phys. Lett. 100, 053302 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644120 Tue, 31 Jan 2012 19:49:42 +0100 5644120 Structural phase transition of graphene caused by GaN epitaxy http://www.medworm.com/index.php?rid=5644119&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053111%2F1%26agg%3Drss We report first-principles predictions, where the structure of graphene changes drastically with the epitaxial growth of GaN (which has been performed experimentally). We identify GaN-sqrt(3) x sqrt(3)/graphene-2 x 2 superstructure as the most probable interface atomic structure, where three C-C b ... [Appl. Phys. Lett. 100, 053111 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644119 Tue, 31 Jan 2012 19:49:42 +0100 5644119 Enhanced efficiency of organic light-emitting devices with metallic electrodes by integrating periodically corrugated structure http://www.medworm.com/index.php?rid=5644118&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053304%2F1%26agg%3Drss Yan-Gang Bi, Jing Feng, Yun-Fei Li, Yu Jin, Yue-Feng Liu et al. Photons trapped in form of surface-plasmon polariton (SPP) modes associated with the metallic electrode/organic interface results in a large energy loss in organic light-emitting devices (OLEDs). We demonstrate efficient outcoupling of SPP modes from one of two metal electrodes by integrating a peri ... [Appl. Phys. Lett. 100, 053304 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644118 Tue, 31 Jan 2012 19:49:42 +0100 5644118 Speed enhancement of multi-particle chain in a traveling standing wave http://www.medworm.com/index.php?rid=5644117&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F051103%2F1%26agg%3Drss Martin Siler, Tomas Cizmar, and Pavel Zemanek A moving array of optical traps created by interference of two counter-propagating evanescent waves has been used for delivery of particle chains up to 18 micro-particles long immersed in water. The particles were optically self-arranged into a linear chain with well-separated distances between them ... [Appl. Phys. Lett. 100, 051103 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644117 Tue, 31 Jan 2012 19:49:42 +0100 5644117 Temperature and humidity effects on superhydrophobicity of nanocomposite coatings http://www.medworm.com/index.php?rid=5644116&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053112%2F1%26agg%3Drss Yong Han Yeong, Adam Steele, Eric Loth, Ilker Bayer, Guillaume De Combarieu et al. This work investigates temperature and humidity effects on the superhydrophobicity of polyurethane/organoclay nanocomposites. Previous reports of superhydrophobic degradation at decreasing surface temperatures for both low and high humidity were generally conducted in open environments. However, the ... [Appl. Phys. Lett. 100, 053112 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644116 Tue, 31 Jan 2012 19:49:42 +0100 5644116 Epitaxial Cr on n-SrTiO(001)An ideal Ohmic contact http://www.medworm.com/index.php?rid=5644115&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F052106%2F1%26agg%3Drss C. Capan, G. Y. Sun, M. E. Bowden, and S. A. Chambers Epitaxial Cr metallizations grown on n-SrTiO(001) by molecular beam epitaxy are shown to result in an ordered interface with Cr bound to O in the terminal TiO layer, no reduction of the SrTiO, and a near-perfect Ohmic contact. Cr/n-SrTiO(001) thus constitutes an ideal interface between a pure metal ... [Appl. Phys. Lett. 100, 052106 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644115 Tue, 31 Jan 2012 19:49:42 +0100 5644115 Contact transport of focused ion beam-deposited Pt to Si nanowires: From measurement to understanding http://www.medworm.com/index.php?rid=5644114&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F053503%2F1%26agg%3Drss J. J. Ke, K. T. Tsai, Y. A. Dai, and J. H. He The Si nanowires (NWs) were contacted by focused ion beam (FIB)-deposited Pt as the Ohmic contacts. Ultralow specific contact resistivity of 1.2 x 10 Omega-cm has been measured. Due to the focused ion beam-induced amorphization of Si NWs, contact behavior is explained by diffusion theory, allowing ... [Appl. Phys. Lett. 100, 053503 (2012)] published Tue Jan 31, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5644114 Tue, 31 Jan 2012 19:49:42 +0100 5644114 Type-II InP-based lasers emitting at 2.55 [mu]m http://www.medworm.com/index.php?rid=5635831&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041109%2F1%26agg%3Drss Stephan Sprengel, Alexander Andrejew, Kristijonas Vizbaras, Tobias Gruendl, Kathrin Geiger et al. Room-temperature lasing at 2.55 [mu]m is reported for InP-based GaInAs/GaAsSb type-II quantum well lasers in pulsed mode up to 42 degrees C. This record long-wavelength lasing has become feasible by implementing compressive strain in both materials and a carrier confinement design using an AlAsSb/A ... [Appl. Phys. Lett. 100, 041109 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635831 Sat, 28 Jan 2012 01:36:24 +0100 5635831 Measurements and imaging of optical gain in optically pumped alkali-rare gas systems http://www.medworm.com/index.php?rid=5635830&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041110%2F1%26agg%3Drss Kristin L. Galbally-Kinney, Daniel L. Maser, William J. Kessler, Wilson T. Rawlins, and Steven J. Davis We have applied diode laser gain spectroscopy to quantitative spectral measurements and 2-D images of small-signal gain in optically pumped cesium-rare gas mixtures. Results are illustrated for Cs absorption broadened by Kr, with CH added to induce spin-orbit mixing between the upper states (P and P ... [Appl. Phys. Lett. 100, 041110 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635830 Sat, 28 Jan 2012 01:36:24 +0100 5635830 Luminescence properties of SiON irradiated by IR laser 808 nm: The role of Si quantum dots and Si chemical environment http://www.medworm.com/index.php?rid=5635829&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042104%2F1%26agg%3Drss Rosa Ruggeri, Fortunato Neri, Antonella Sciuto, Vittorio Privitera, Corrado Spinella et al. We investigated optical, structural, and chemical properties of SiON layers irradiated by CW IR laser during a time lapse of few milliseconds. We observed tunable photoluminescence signal at room temperature in the range 750950 nm, without Si/SiO phase separation, depending on the IR laser power irr ... [Appl. Phys. Lett. 100, 042104 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635829 Sat, 28 Jan 2012 01:36:24 +0100 5635829 High magnetic field annealing effect on visible photoluminescence enhancement of TiO nanotube arrays http://www.medworm.com/index.php?rid=5635828&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043106%2F1%26agg%3Drss Mingjie Yang, Wei Liu, Jia-Lin Sun, and Jia-Lin Zhu TiO nanotube arrays with remarkable visible photoluminescence were prepared by high magnetic field annealing in air at 450 degrees C due to the involvement of oxygen vacancies (OVs). A field with the intensities of 0, 2, 4, 6, and 8 T were applied in the annealing processing, along the directions s ... [Appl. Phys. Lett. 100, 043106 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635828 Sat, 28 Jan 2012 01:36:24 +0100 5635828 Frequency locking of single-mode 3.5-THz quantum cascade lasers using a gas cell http://www.medworm.com/index.php?rid=5635827&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041111%2F1%26agg%3Drss We report frequency locking of two 3.5-THz third-order distributed feedback (DFB) quantum cascade lasers (QCLs) by using methanol molecular absorption lines, a proportional-integral-derivative controller, and a NbN bolometer. We show that the free-running linewidths of the QCLs are dependent on the ... [Appl. Phys. Lett. 100, 041111 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635827 Sat, 28 Jan 2012 01:36:24 +0100 5635827 Single-photon generation from a nitrogen impurity center in GaAs http://www.medworm.com/index.php?rid=5635826&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042106%2F1%26agg%3Drss Michio Ikezawa, Yoshiki Sakuma, Liao Zhang, Yosinori Sone, Tatsuya Mori et al. We have demonstrated single-photon emission from a nitrogen luminescence center in GaAs. An inhomogeneously broadened luminescence band formed by localized centers was observed in the spectral range from 1480 meV to 1510 meV at 5 K in nitrogen delta-doped GaAs. Optical properties of the individual c ... [Appl. Phys. Lett. 100, 042106 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635826 Sat, 28 Jan 2012 01:36:24 +0100 5635826 Origin of the enhanced polarization in La and Mg co-substituted BiFeO thin film during the fatigue process http://www.medworm.com/index.php?rid=5635825&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042902%2F1%26agg%3Drss Qingqing Ke, Amit Kumar, Xiaojie Lou, Kaiyang Zeng, and John Wang We have studied the polarization fatigue of La and Mg co-substituted BiFeO thin film, where a polarization peak is observed during the fatigue process. The origin of such anomalous behavior is analyzed on the basis of the defect evolution using temperature-dependent impedance spectroscopy. It shows ... [Appl. Phys. Lett. 100, 042902 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635825 Sat, 28 Jan 2012 01:36:24 +0100 5635825 Parabolic tapered photonic crystal cavity in silicon http://www.medworm.com/index.php?rid=5635824&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041112%2F1%26agg%3Drss Boris Desiatov, Ilya Goykhman, and Uriel Levy We demonstrate the design, fabrication, transmission spectrum measurement, and near-field characterization of a parabolic tapered one-dimensional photonic crystal cavity in silicon. The results shows a relatively high quality factor (~43 000), together with a small modal volume of ~1.1(lambda/n). Mo ... [Appl. Phys. Lett. 100, 041112 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635824 Sat, 28 Jan 2012 01:36:24 +0100 5635824 Recoverable electrical transition in a single graphene sheet for application in nonvolatile memories http://www.medworm.com/index.php?rid=5635823&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042105%2F1%26agg%3Drss Chaoxing Wu, Fushan Li, Yongai Zhang, and Tailiang Guo The electrical properties of a resistive-switching memory based on a single graphene sheet suspended on a patterned indium-tin-oxide electrode pair were investigated. Current-voltage measurements on the planar device showed a large ON/OFF ratio (~10) and excellent retention ability in ambient condit ... [Appl. Phys. Lett. 100, 042105 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635823 Sat, 28 Jan 2012 01:36:24 +0100 5635823 Publisher's Note: Fluxgate based detection of magnetic nanoparticle dynamics in a rotating magnetic field [Appl. Phys. Lett. 99, 112501 (2011)] http://www.medworm.com/index.php?rid=5635822&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F049902%2F1%26agg%3Drss Jan Dieckhoff, Meinhard Schilling, and Frank Ludwig Abstract not available. [Appl. Phys. Lett. 100, 049902 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635822 Sat, 28 Jan 2012 01:36:24 +0100 5635822 Intravascular ultrasound chirp imaging http://www.medworm.com/index.php?rid=5635821&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043703%2F1%26agg%3Drss D. Maresca, K. Jansen, G. Renaud, G. van Soest, X. Li et al. We demonstrate the feasibility of intravascular ultrasound (IVUS) chirp imaging as well as chirp reversal ultrasound contrast imaging at intravascular ultrasound frequency. Chirp excitations were emitted with a 34 MHz single crystal intravascular transducer and compared to conventional Gaussian-shap ... [Appl. Phys. Lett. 100, 043703 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635821 Sat, 28 Jan 2012 01:36:24 +0100 5635821 Response to Comment on `The electromagnetic property of chemically reduced graphene oxide and its application as microwave absorbing material' [Appl. Phys. Lett. 100, 046101 (2012)] http://www.medworm.com/index.php?rid=5635820&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F046102%2F1%26agg%3Drss Chao Wang, Xijiang Han, Ping Xu, Xiaolin Zhang, Yunchen Du et al. Abstract not available. [Appl. Phys. Lett. 100, 046102 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635820 Sat, 28 Jan 2012 01:36:24 +0100 5635820 Publisher's Note: Role of correlation effects in the superconducting material: InVS [Appl. Phys. Lett. 99, 221904 (2011)] http://www.medworm.com/index.php?rid=5635819&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F049901%2F1%26agg%3Drss M. Ramzan and R. Ahuja Abstract not available. [Appl. Phys. Lett. 100, 049901 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635819 Sat, 28 Jan 2012 01:36:24 +0100 5635819 Single charge sensing and transport in double quantum dots fabricated from commercially grown Si/SiGe heterostructures http://www.medworm.com/index.php?rid=5635818&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043508%2F1%26agg%3Drss C. Payette, K. Wang, P. J. Koppinen, Y. Dovzhenko, J. C. Sturm et al. We perform quantum Hall measurements on three types of commercially available modulation-doped Si/SiGe heterostructures to determine their suitability for depletion gate defined quantum dot devices. By adjusting the growth parameters, we are able to achieve electron gases with charge densities 13 x ... [Appl. Phys. Lett. 100, 043508 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635818 Sat, 28 Jan 2012 01:36:24 +0100 5635818 Comment on The electromagnetic property of chemically reduced graphene oxide and its application as microwave absorbing material [Appl. Phys. Lett. 98, 072906 (2011)] http://www.medworm.com/index.php?rid=5635817&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F046101%2F1%26agg%3Drss F. Qin and C. Brosseau Abstract not available. [Appl. Phys. Lett. 100, 046101 (2012)] published Wed Jan 25, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635817 Sat, 28 Jan 2012 01:36:24 +0100 5635817 Side-dependent electron escape from graphene- and graphane-like SiC layers http://www.medworm.com/index.php?rid=5635816&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043110%2F1%26agg%3Drss Paola Gori, Olivia Pulci, Margherita Marsili, and Friedhelm Bechstedt The structural and electronic properties of SiC-based two-dimensional (2D) crystals are studied by means of density functional theory and many-body perturbation theory. Such properties cannot simply be interpolated between graphene and silicene. The replacement of half of the C atoms by Si atoms ope ... [Appl. Phys. Lett. 100, 043110 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635816 Sat, 28 Jan 2012 01:36:24 +0100 5635816 Enhanced magnetic properties of Dy substituted Ni-Cu-Zn ferrite nanoparticles http://www.medworm.com/index.php?rid=5635815&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042407%2F1%26agg%3Drss Sagar E. Shirsath, R. H. Kadam, S. M. Patange, M. L. Mane, Ali Ghasemi et al. Dy substituted Ni-Cu-Zn (NiCuZnDyFeO) ferrite nanoparticles were obtained at 600 degrees C by synthesizing sol-gel auto-combustion method, and they exhibit a particle size of 1221 nm. X-ray diffraction patterns confirm the presence of secondary phase of DyFeO and FeO for the Dy substituted samples. ... [Appl. Phys. Lett. 100, 042407 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635815 Sat, 28 Jan 2012 01:36:24 +0100 5635815 Enhanced longitudinal mode spacing in blue-violet InGaN semiconductor lasers http://www.medworm.com/index.php?rid=5635814&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041113%2F1%26agg%3Drss I. V. Smetanin and P. P. Vasil'ev An explanation of observed enhanced longitudinal mode spacing in InGaN semiconductor lasers has been proposed. It has been demonstrated that e-h plasma oscillations, which can exist in the laser active layer at certain driving conditions, are responsible for mode clustering effect. The resonant exci ... [Appl. Phys. Lett. 100, 041113 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635814 Sat, 28 Jan 2012 01:36:24 +0100 5635814 Photoreflectance study of direct-gap interband transitions in Ge/SiGe multiple quantum wells with Ge-rich barriers http://www.medworm.com/index.php?rid=5635813&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041905%2F1%26agg%3Drss H. P. Hsu, P. H. Wu, Y. S. Huang, D. Chrastina, G. Isella et al. Photoreflectance (PR) was used to study the direct-gap interband transitions in strain-compensated Ge/SiGe multiple quantum well (MQW) structures with Ge-rich SiGe barriers grown by low-energy plasma-enhanced chemical vapor deposition. The PR spectra revealed a wide range of possible optical transit ... [Appl. Phys. Lett. 100, 041905 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635813 Sat, 28 Jan 2012 01:36:24 +0100 5635813 A mathematical model of mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow http://www.medworm.com/index.php?rid=5635812&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041907%2F1%26agg%3Drss Zhongbin Xu, Yue Yang, Damien Vadillo, Xiaodong Ruan, and Xin Fu A microfluidic channel with a constriction produced poor mixing conditions under periodic electro-osmotic flow. However, the mixing performance may be enhanced significantly by altering other parameters. Numerical simulations are used to investigate the effect of the direct current electric field (E ... [Appl. Phys. Lett. 100, 041907 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635812 Sat, 28 Jan 2012 01:36:24 +0100 5635812 Thermal process dependence of Li configuration and electrical properties of Li-doped ZnO http://www.medworm.com/index.php?rid=5635811&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042107%2F1%26agg%3Drss Z. Zhang, K. E. Knutsen, T. Merz, A. Yu. Kuznetsov, B. G. Svensson et al. We used depth-resolved cathodoluminescence spectroscopy (DRCLS) to describe the strong dependence of Li acceptor formation on thermal treatment in Li-doped ZnO. Within a 500-600 degrees C annealing temperature range, subsequent quenching ZnO leaves Li as interstitial donors, resulting in low room t ... [Appl. Phys. Lett. 100, 042107 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635811 Sat, 28 Jan 2012 01:36:24 +0100 5635811 Giant electro-mechanical energy conversion in [011] cut ferroelectric single crystals http://www.medworm.com/index.php?rid=5635810&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F042903%2F1%26agg%3Drss Wen D. Dong, Peter Finkel, Ahmed Amin, and Christopher S. Lynch Giant electro-mechanical energy conversion is demonstrated under a ferroelectric/ferroelectric phase transformation in [011] cut and poled lead titanate-based relaxor perovskite morphotropic single crystals. It is found that under mechanical pre-stress, a relatively small oscillatory stress drives t ... [Appl. Phys. Lett. 100, 042903 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635810 Sat, 28 Jan 2012 01:36:24 +0100 5635810 Time-dynamics of the two-color emission from vertical-external-cavity surface-emitting lasers http://www.medworm.com/index.php?rid=5635809&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041114%2F1%26agg%3Drss A. Chernikov, M. Wichmann, M. K. Shakfa, M. Scheller, J. V. Moloney et al. The temporal stability of a two-color vertical-external-cavity surface-emitting laser is studied using single-shot streak-camera measurements. The collected data is evaluated via quantitative statistical analysis schemes. Dynamically stable and unstable regions for the two-color operation are identi ... [Appl. Phys. Lett. 100, 041114 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635809 Sat, 28 Jan 2012 01:36:24 +0100 5635809 Transition of beam dynamics in waveguide arrays with commensurate Stark ladders http://www.medworm.com/index.php?rid=5635808&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041115%2F1%26agg%3Drss G. Wang We theoretically investigate the transition of coherent dynamics of light among different transport regimes in waveguide arrays with commensurate Stark ladders. Applying a transverse confinement to the lattice structure, the eigenvalue spectrum becomes discrete and equidistant, i.e., commensurate St ... [Appl. Phys. Lett. 100, 041115 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635808 Sat, 28 Jan 2012 01:36:24 +0100 5635808 Anomalous electron transport in back-gated field-effect transistors with TiTe semimetal thin-film channels http://www.medworm.com/index.php?rid=5635807&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043109%2F1%26agg%3Drss J. Khan, C. M. Nolen, D. Teweldebrhan, D. Wickramaratne, R. K. Lake et al. The authors report on graphene-like mechanical exfoliation of thin films of titanium ditelluride and investigation of their electronic properties. The exfoliated crystalline TiTe films were used as the channel layers in the back-gated field-effect transistors fabricated with Ti/Al/Au metal contacts ... [Appl. Phys. Lett. 100, 043109 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635807 Sat, 28 Jan 2012 01:36:24 +0100 5635807 Surface plasmon resonance and surface-enhanced Raman scattering sensing enabled by digital versatile discs http://www.medworm.com/index.php?rid=5635806&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041116%2F1%26agg%3Drss We report the simultaneous achievement of sensitive surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS) sensing using digital versatile discs (DVDs). The aluminum-covered data tracks of DVDs can efficiently concentrate local electromagnetic field, resulting in an excellent S ... [Appl. Phys. Lett. 100, 041116 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635806 Sat, 28 Jan 2012 01:36:24 +0100 5635806 Effective energy gap of the double-walled carbon nanotubes with field effect transistors ambipolar characteristics http://www.medworm.com/index.php?rid=5635805&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043107%2F1%26agg%3Drss Takahiro Morimoto, Akihiro Kuno, Shota Yajima, Koji Ishibashi, Koji Tsuchiya et al. We have investigated the transport property of the double-walled carbon nanotubes (DWCNT)-field effect transistor (FET) devices with HfO insulating layers at room temperature and 4.2 K. These devices show the ambipolar FET characteristics after deposition of HfO insulating layer. The off-regions of ... [Appl. Phys. Lett. 100, 043107 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635805 Sat, 28 Jan 2012 01:36:24 +0100 5635805 Synthesis of single-component metallic glasses by thermal spray of nanodroplets on amorphous substrates http://www.medworm.com/index.php?rid=5635804&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041909%2F1%26agg%3Drss Qi An, Sheng-Nian Luo, William A. Goddard, III, W. Z. Han, B. Arman et al. We show that single component metallic glasses can be synthesized by thermal spray coating of nanodroplets onto an amorphous substrate. We demonstrate this using molecular dynamics simulations of nanodroplets up to 30 nm that the spreading of the nanodroplets during impact on a substrate leads to su ... [Appl. Phys. Lett. 100, 041909 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635804 Sat, 28 Jan 2012 01:36:24 +0100 5635804 Surface modification by subsurface pressure induced diffusion http://www.medworm.com/index.php?rid=5635803&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041908%2F1%26agg%3Drss Claus G. Zimmermann Polycrystalline Ag, covered with a nm thin siloxane layer, was irradiated with ultraviolet light in vacuum at 500 K. Ag particles of different aspect ratios, 501000 nm in size, formed on the surface, including a small fraction of nanorods. Pressurized water vapor bubbles are created in the subsurfac ... [Appl. Phys. Lett. 100, 041908 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635803 Sat, 28 Jan 2012 01:36:24 +0100 5635803 Plasmon assisted light propagation and Raman scattering hot-spot in end-to-end coupled silver nanowire pairs http://www.medworm.com/index.php?rid=5635802&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043108%2F1%26agg%3Drss Rohit Chikkaraddy, Danveer Singh, and G. V. Pavan Kumar Herein, we report on the experimental observation of light propagation and localization capabilities of end-to-end connected silver nanowire (Ag NW) pairs. By exciting the surface plasmon polaritons at one end of Ag NW pair, we observed relatively intense light emission at the junction and weak ligh ... [Appl. Phys. Lett. 100, 043108 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635802 Sat, 28 Jan 2012 01:36:24 +0100 5635802 Growth sector dependence and mechanism of stress formation in epitaxial diamond growth http://www.medworm.com/index.php?rid=5635801&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F041906%2F1%26agg%3Drss M. Fischer, S. Gsell, M. Schreck, and A. Bergmaier Stress generation in epitaxial diamond growth was investigated by [mu]-Raman spectroscopy and high resolution x-ray diffraction. Intrinsic stress could be varied systematically from compressive to tensile covering a huge range of 5 GPa. The temperature-stress curve for growth on {111}-sectors as com ... [Appl. Phys. Lett. 100, 041906 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635801 Sat, 28 Jan 2012 01:36:24 +0100 5635801 The influence of Al composition on point defect incorporation in AlGaN http://www.medworm.com/index.php?rid=5635800&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F043509%2F1%26agg%3Drss T. A. Henry, A. Armstrong, A. A. Allerman, and M. H. Crawford The effects of point defects in AlGaN (x = 0-0.33) films with similar threading dislocation densities were investigated. The epitaxial layers were grown under conditions applicable to laser-diode quantum wells, barriers and waveguide layers. The evolution of deep level defect energy and density were ... [Appl. Phys. Lett. 100, 043509 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635800 Sat, 28 Jan 2012 01:36:24 +0100 5635800 Negative differential thermal conductance through vacuum http://www.medworm.com/index.php?rid=5635799&cid=s_37541_75_f&fid=37541&url=http%3A%2F%2Flink.aip.org%2Flink%2F%3FAPL%2F100%2F044104%2F1%26agg%3Drss Linxiao Zhu, Clayton R. Otey, and Shanhui Fan We propose a scheme for achieving negative differential thermal conductance in near-field electromagnetic thermal transfer. As an example, we show that the scheme can be implemented with two slabs of silicon carbide brought in close proximity to each other. We also describe how a bistable thermal sw ... [Appl. Phys. Lett. 100, 044104 (2012)] published Thu Jan 26, 2012. (Source: Applied Physics Letters) Applied Physics Letters journals http://www.medworm.com/rss/comments.php?id=5635799 Sat, 28 Jan 2012 01:36:24 +0100 5635799