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Control of free space propagation of Airy beams generated by quadratic nonlinear photonic crystalsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present experimentally the control of free space propagation of an Airy beam. This beam is generated by a nonlinear wave mixing process in an asymmetrically poled nonlinear photonic crystal. Changing the quasi-phase matching conditions, e.g., the crystal temperature or pump wavelength, alters the ... [Appl. Phys. Lett. 95, 201112 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Synergistic information encoding by combinatorial pulse operation of ferroelectricsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Dan Ricinschi, Damian Nicastro, Takeshi Kanashima, and Masanori Okuyama We explore beyond binary memory capability of ferroelectrics, aiming to render them able to encode multiple bit information, based on operation in a regime spanning several polarization reversal mechanisms. Accessing a Pb(Zr,Ti)O ceramic capacitor with combinatorial sequences of pulses whose amplitu ... [Appl. Phys. Lett. 95, 202905 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Spectrally resolved confocal microscopy for laser mode imaging and beam characteristic investigationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
W. Brezna and J. Smoliner In this letter, confocal optical microscopy is used to investigate the intensity patterns of an infrared vertical cavity surface emitting laser in three dimensions with high spectral resolution. The measurements were performed between the near field (Fresnel) regime and the far field (Fraunhofer) re ... [Appl. Phys. Lett. 95, 201118 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Measurement of the electron density in a microwave plasma torch at atmospheric pressureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Qing Zhang, Guixin Zhang, Liming Wang, Xinxin Wang, Shumin Wang et al. The electron density in a microwave plasma torch at atmospheric pressure was measured with a MachZehnder interferometer. The electron density is on the order of 10/cm, one order higher than that deduced from the Stark broadening of spectral lines, and increases with the increase in the microwave pow ... [Appl. Phys. Lett. 95, 201502 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Surface functionalized BaSrTiO /poly(vinylidene fluoride) nanocomposites with significantly enhanced dielectric propertiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Kecheng Li, Hong Wang, Feng Xiang, Weihong Liu, and Haibo Yang A nanocomposite was prepared by embedding BaSrTiO (BST)/silver core/shell nanoparticles (BST@Ag) into polyvinylidene-fluoride (PVDF). Through functionalizing the surface of BST nanoparticles by silver coating, the relative permittivity of composites was significantly increased to 153 at 100 Hz which ... [Appl. Phys. Lett. 95, 202904 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Efficient inverted top-emitting organic light-emitting diodes using ultrathin MoO/C bilayer structure to enhance hole injectionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Jianhua Hou, Jiang Wu, Zhiyuan Xie, and Lixiang Wang Efficient inverted top-emitting organic light-emitting diodes with aluminum (Al) as both the cathode and semitransparent anode are investigated. It is found that introduction of the ultrathin molybdenum trioxide (MoO)/fullerene (C) bilayer structure between the low work function Al top anode and the ... [Appl. Phys. Lett. 95, 203508 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Effects of well width and growth temperature on optical and structural characteristics of AlN/GaN superlattices grown by metal-organic chemical vapor depositionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
C. Bayram, N. Pere-laperne, and M. Razeghi AlN/GaN superlattices (SLs) employing various well widths (from 1.5 to 7.0 nm) are grown by metal-organic chemical vapor deposition technique at various growth temperatures (T) (from 900 to 1035 degrees C). The photoluminescence (PL), x-ray diffraction, and intersubband (ISB) absorption characteris ... [Appl. Phys. Lett. 95, 201906 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Study of an organic-inorganic hybrid columinescence system by photoacoustic methodEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yue-tao Yang, Xiao-jun Liu, and Shu-yi Zhang In this work, a columinescence system is found for lanthanide complexes Ln(p-ABA)HO (p-ABA: p-aminobenzoic acid) incorporated in silica matrix. It is found that the luminescence quantum yield of Tb emissions increases remarkably when partly replacing Tb(p-ABA)HO by Gd(p-ABA)HO in silica glass. Moreo ... [Appl. Phys. Lett. 95, 201115 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

On the interface state density at InGaAs/oxide interfacesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
G. Brammertz, H.-C. Lin, M. Caymax, M. Meuris, M. Heyns et al. The authors model the capacitance-voltage (CV) behavior of InGaAs metal-oxide-semiconductor (MOS) structures and compare the results to experimental CV-curves. Due to the very low conduction band density of states, ideal III-V MOS structures should present an asymmetric CV behavior, with lower accum ... [Appl. Phys. Lett. 95, 202109 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Magnetoresistance in magnetic tunnel junctions with an organic barrier and an MgO spin filterEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Greg Szulczewski, Huseyin Tokuc, Kaan Oguz, and J. M. D. Coey Exchange-biased magnetic tunnel junctions with a CoFeB/MgO pinned layer, a Co free layer and an aluminum tris-(8-hydroxyquinoline) spacer layer of thickness ranging from 08 nm have been prepared by photolithography. The devices show a room-temperature, zero-bias magnetoresistance of 12.50.3%, which ... [Appl. Phys. Lett. 95, 202506 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Erratum: Broad-band electromagnetic-wave absorption by FeCo/C nanocapsules [Appl. Phys. Lett. 95, 023114 (2009)]Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Z. Han, D. Li, H. Wang, X. G. Liu, J. Li et al. Abstract not available. [Appl. Phys. Lett. 95, 209901 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Direct observation of carrier depletion around a dislocation in GaP by scanning spreading resistance microscopyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
T. Yokoyama, R. Takenaka, Y. Kamimura, K. Edagawa, and I. Yonenaga The local electrical resistivities in deformed n-GaP have been measured by scanning spreading resistance microscopy (SSRM). The SSRM images show chainlike alignments of spots with high resistivity along the slip direction. These spots can be attributed to carrier-depletion around a charged dislocati ... [Appl. Phys. Lett. 95, 202108 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Reduced hole injection barrier for achieving ultralow voltage polymer space-charge-limited transistor with a high on/off current ratioEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yu-Chiang Chao, Yi-Cheng Lin, Min-Zhi Dai, Hsiao-Wen Zan, and Hsin-Fei Meng Vertical polymer space-charge limited transistor (SCLT) operated with an ultralow voltage is demonstrated. The influence of aging effect of the oxygen plasma treated indium tin oxide electrode on the hole injection barrier and on the transistor characteristics is investigated. By reducing the hole i ... [Appl. Phys. Lett. 95, 203305 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

On carrier spillover in c- and m-plane InGaN light emitting diodesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. Lee, X. Li, X. Ni, U. Ozgur, H. Morkoc et al. The internal quantum efficiency (IQE) and relative external quantum efficiency (EQE) in InGaN light-emitting diodes (LEDs) emitting at 400 nm with and without electron blocking layers (EBLs) on c-plane GaN and m-plane GaN were investigated in order to shed some light on any effect of polarization ch ... [Appl. Phys. Lett. 95, 201113 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Extremely broadened high-order harmonics generated by the femtosecond pulses propagating through the filaments in airEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
R. A. Ganeev and H. Kuroda We demonstrate a considerable broadening of the harmonics generating in laser plasma using the laser pulses propagating through the filaments in air. A fourfold increase of harmonic bandwidth was achieved in the case of phase-modulated laser pulses, alongside with an increase in harmonic conversion ... [Appl. Phys. Lett. 95, 201117 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Electronic characteristics of the interfacial states embedded in buffer-free GaSb/GaAs (001) heterojunctionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report a comprehensive study of the electronic properties and compensation of the interfacial states embedded in a majority carrier electron region either on one or both sides of the buffer-free GaSb/GaAs (001) heterointerface. An abrupt change observed in the forward-bias current (58 mA) for a s ... [Appl. Phys. Lett. 95, 202107 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Resonant nanometric cross-shaped apertures: Single apertures versus periodic arraysEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
L. Lin, L. B. Hande, and A. Roberts Here localized surface plasmon (LSP) resonances occurring inside cross-shaped apertures arranged in thin metallic films are investigated. It is shown that these resonances can be controlled by altering the geometry of the apertures, whereas surface plasmon polariton excitation and Wood anomalies ari ... [Appl. Phys. Lett. 95, 201116 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Surface-plasmon mode hybridization in subwavelength microdisk lasersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
R. Perahia, T. P. Mayer Alegre, A. H. Safavi-Naeini, and O. Painter Hybridization of surface-plasmon and dielectric waveguide whispering-gallery modes are demonstrated in a semiconductor microdisk laser cavity of subwavelength proportions. A metal layer is deposited on top of the semiconductor microdisk, the radius of which is systematically varied to enable mode hy ... [Appl. Phys. Lett. 95, 201114 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Hybrid InP-based photonic crystal lasers on silicon on insulator wiresEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report on InP-based photonic crystal lasers operating at 1.585 [mu]m at room temperature, integrated with and evanescently coupled to silicon on insulator (SOI) waveguides. By optically pumping at 1.18 [mu]m through the SOI wires, pulsed laser emission from line defect photonic crystal waveguid ... [Appl. Phys. Lett. 95, 201119 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Observation of space-charge-limited current due to charge generation at interface of molybdenum dioxide and organic layerEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Toshinori Matsushima and Hideyuki Murata Current density-voltage characteristics of hole-only devices are influenced by thicknesses of molybdenum dioxide (MoO) and molybdenum trioxide (MoO) as buffer layers. A space-charge-limited current of N,N-diphenyl-N,N-bis(1-naphthyl)-1,1-biphenyl-4,4-diamine (alpha-NPD) is observed in a wide range o ... [Appl. Phys. Lett. 95, 203306 (2009)] published Fri Nov 20, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 21, 2009 Category: Physics Source Type: journals

Superparamagnetic limit to spin-polarized vacuum tunneling from Fe-coated W(001) tipsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Y. R. Niu and M. S. Altman Superparamagnetic fluctuations of magnetization in thin Fe films that coat a sharp W(001) tip are evident in the spin polarization of field emitted electrons. Fluctuations of polarization between four transverse directions that align with the tip directions are consistent with the in-plane biaxial ... [Appl. Phys. Lett. 95, 203113 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Telescopic hot double wall carbon nanotube for nanolithographyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. Popescu and L. M. Woods A custom double wall carbon nanotube for thermal surface modification is proposed. By studying the heat transfer characteristics in the system, it is demonstrated that such a device is capable of producing high resolution patterns on a sample surface. A constant distance between the double wall carb ... [Appl. Phys. Lett. 95, 203507 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Photoluminescence enhancement of Er-doped silica containing Ge nanoclustersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
J. Guzman, S. J. Shin, C. Y. Liao, C. W. Yuan, P. R. Stone et al. The photoluminescence (PL) of Er-doped silica films containing Ge nanoclusters synthesized by ion implantation was investigated. The area of the 1540 nm Er PL peak was enhanced by up to a factor of 200 by the addition of Ge nanoclusters. The PL enhancement was found to be proportional to the concent ... [Appl. Phys. Lett. 95, 201904 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Hard x-ray phase contrast imaging of black lipid membranesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report hard x-ray phase contrast imaging of black lipid membranes, freely suspended over a micromachined aperture in an aqueous solution. Biomolecular and organic substances can thus be probed in hydrated environments by parallel beam propagation imaging, using coherent multi-kilo-electronvolt x- ... [Appl. Phys. Lett. 95, 203703 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Superhydrophobic floatability of a hydrophilic object driven by edge effectEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Feng-Ming Chang, Yu-Jane Sheng, and Heng-Kwong Tsao It is generally believed that a water-repellent surface is necessary for small insects to stand on water. Through a combined experimental and theoretical study, we demonstrate that an object with hydrophilic surface can float with apparent contact angle greater than 90 degrees due to edge effect. T ... [Appl. Phys. Lett. 95, 204107 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Electrohydrodynamic repulsion of droplets falling on an insulating substrate in an electric fieldEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Bumjoo Kim, Intae Kim, Sang W. Joo, and Geunbae Lim Control technique for charged droplets, named as electrohydrodynamic droplet repulsion (EDR), is reported. Charged droplets emitting from a capillary and falling down toward an insulating substrate are deflected from their intended impact point due to the like polarity of previously fallen droplets. ... [Appl. Phys. Lett. 95, 204106 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Reflection-mode sensing using optical microresonatorsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Barry Koch, Yasha Yi, Jun-Ying Zhang, Stephen Znameroski, and Terry Smith The authors present an approach for applying optical microring resonators to sensing. The approach relies on the interaction of the resonator with a nanoparticle taggant, which can induce coupling between forward and backward propagating traveling-wave resonant modes of the device. In the convention ... [Appl. Phys. Lett. 95, 201111 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Four discrete Hall resistance states in single-layer Fe film for quaternary memory devicesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report the realization of four distinct magnetic states using single layers of Fe at room temperature. When the Fe film was grown on the vicinal surface of GaAs, the fourfold-symmetric magnetization along crystallographic direction give rise to four distinct Hall resistance values due to the diff ... [Appl. Phys. Lett. 95, 202505 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Autonomous microfluidic transport using electrowetting-based valves and integrated cellsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Papaorn Siribunbandal, Shigeki Yamaguchi, Kenichi Kojima, Junji Fukuda, and Hiroaki Suzuki Autonomous control of the transport of solutions in microfabricated flow channels using electrowetting-based valves and integrated electrochemical cells is proposed. An electrowetting-based valve formed with a gold electrode was opened when an electrolyte solution reached a zinc electrode in a contr ... [Appl. Phys. Lett. 95, 204105 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Electronic structure of substitutional Mn in epitaxial InMnSb filmEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
N. D. Parashar, D. J. Keavney, and B. W. Wessels The magnetic and electronic structure of Mn in InMnSb ferromagnetic semiconductor thin film was studied by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. Comparison with atomic multiplet calculations suggests that manganese substitutes on sites with tetrahedral symmetry. Strong ... [Appl. Phys. Lett. 95, 201905 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Dynamical and quasistatic structural relaxation paths in PdNiP glassEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. Kahl, T. Koeppe, D. Bedorf, R. Richert, M. L. Lind et al. By sequential heat treatment of a PdNiP metallic glass at temperatures and durations for which alpha-relaxation is not possible, dynamic, and quasistatic relaxation paths below the glass transition are identified via ex situ ultrasonic measurements following each heat treatment. The dynamic relaxati ... [Appl. Phys. Lett. 95, 201903 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Fully bendable polymer light emitting devices with carbon nanotubes as cathode and anodeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Zhibin Yu, Liangbing Hu, Zhitian Liu, Mingliang Sun, Meiliang Wang et al. Polymer light emitting devices were fabricated by roll lamination using single-walled carbon nanotubes as both anode and cathode. The devices exhibited a low turn-on voltage of 3.8 V, high brightness of 1400 cd/m at 10 V and maximum efficiency of 2.2 cd/A at 480 cd/m. The devices are also highly t ... [Appl. Phys. Lett. 95, 203304 (2009)] published Thu Nov 19, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 20, 2009 Category: Physics Source Type: journals

Bipolar resistive switching in individual AuNiOAu segmented nanowiresEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Edward D. Herderick, Kongara M. Reddy, Rachel N. Sample, Thomas I. Draskovic, and Nitin P. Padture Evidence for bipolar resistive switching is reported in individual metal-oxide-metal (MOM) nanowires in the system AuNiOAu, and a plausible mechanism for the same is presented. The MOM nanowire architecture may be well suited for much needed fundamental studies of resistive switching because it prov ... [Appl. Phys. Lett. 95, 203505 (2009)] published Tue Nov 17, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Direct measurement of auger recombination in InGaN/GaN quantum wells and its impact on the efficiency of InGaN/GaN multiple quantum well light emitting diodesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
M. Zhang, P. Bhattacharya, J. Singh, and J. Hinckley The Auger recombination coefficient in InGaN/GaN quantum wells, emitting at 407 nm has been determined from large signal modulation measurements on lasers in which these quantum wells form the gain region. A value of 1.5 x 10 cm s is determined for the Auger coefficient at room temperature, which i ... [Appl. Phys. Lett. 95, 201108 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Microwave conductance spectra of single-walled carbon nanotube arraysEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Clark Highstrete, Mark Lee, A. Alec Talin, and Andrew L. Vance Complex conductance spectra of single-walled carbon nanotube (SWCNT) arrays have been measured from 0.1 to 50 GHz at temperatures between 4 and 293 K. Using purely capacitive contacts to separate contact effects from the NTs' response, the intrinsic SWCNT array conductance increased with frequency a ... [Appl. Phys. Lett. 95, 203111 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Aggregates-induced dynamic negative differential resistance in conducting organic filmsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Xian Ning Xie, Junzhong Wang, Kian Ping Loh, and Andrew Thye Shen Wee This letter reports the negative differential resistance (NDR) behavior of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride films induced by aggregate formation in the film. It is observed that aggregate-states in the energy gap can by-pass the common charge conduction mode, and electron injec ... [Appl. Phys. Lett. 95, 203302 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Electronic properties and open-circuit voltage enhancement in mixed copper phthalocyanine:fullerene bulk heterojunction photovoltaic devicesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
T. W. Ng, M. F. Lo, M. K. Fung, S. L. Lai, Z. T. Liu et al. While bulk heterojunctions (HJ) have been used in organic photovoltaic (OPV) devices, there are few studies on their interface electronics and mechanisms on device performance. Here, we studied the electronic structure of a mixed CuPc:C and a discrete CuPc/C junctions using photoemission spectroscop ... [Appl. Phys. Lett. 95, 203303 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Charge transport in polypyrrole:ZnO-nanowires composite filmsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A. Singh, Aditee Joshi, S. Samanta, A. K. Debnath, D. K. Aswal et al. Low temperature electrical transport properties of composite polypyrrole (PPy) films having ZnO-nanowires (ZnONWs) in the range of 050 wt. % have been investigated. It has been found that pure PPy film is in the critical regime of the metal-to-insulator transition, and adding ZnONWs drive composite ... [Appl. Phys. Lett. 95, 202106 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Fabrication of a transparent and flexible thin film transistor based on single-walled carbon nanotubes using the direct transfer methodEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. H. Tseng and N. H. Tai The fabrication of transparent and flexible thin film transistors (TFTs), using single-walled carbon nanotube (SWCNT) networks as bottom gates and conducting channels and polymethylmethacrylate (PMMA) as an insulating layer, by the direct transfer method is demonstrated. The fabricated SWCNT-TFTs ex ... [Appl. Phys. Lett. 95, 204104 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Preparation of monodisperse emulsions by hydrodynamic size fractionationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We describe a microfluidic system allowing fast and efficient size-dependent separation of droplets using hydrodynamics. This system allows efficient fractionation of droplets with a difference in volume as small as 2.33-fold (corresponding to a 1.33-fold difference in diameter of spherical droplets ... [Appl. Phys. Lett. 95, 204103 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Shape-dependent nonlinear absorption and relaxation in CuInS nanocrystalsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We report the observation of nonlinear-optical response and relaxation in copper indium sulfide (CuInS) crystalline nanoparticles and nanorods with femtosecond Z-scans and transient absorption measurements. Dependent on the size and shape, two-photon absorption and saturation in the one-photon absor ... [Appl. Phys. Lett. 95, 201109 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Visualization of highly graded oxygen vacancy profiles in lead-zirconate-titanate by spectrally resolved cathodoluminescence spectroscopyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Atsuo Matsutani, Zhenhua (Jerry) Luo, Soodkhet Pojprapai, Mark Hoffman, and Giuseppe Pezzotti The ultraviolet and visible cathodoluminescence (CL) emitted at room temperature from bulk hard lead-zirconate-titanate polycrystalline perovskite has been systematically collected before and after an annealing cycle conducted in a reducing atmosphere. Spectroscopic assessments have been made of the ... [Appl. Phys. Lett. 95, 202903 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Sound control by temperature gradientsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Jose Sanchez-Dehesa, Mitko I. Angelov, Francisco Cervera, and Liang-Wu Cai This work reports experiments showing that airborne sound propagation can be controlled by temperature gradients. A system of two heated tubes is here used to demonstrate the collimation and focusing of an ultrasonic beam by the refractive index profile created by the temperature gradients existing ... [Appl. Phys. Lett. 95, 204102 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Josephson effects in weakly coupled MgB intergrain nanobridges prepared by focused ion beamEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Soon-Gul Lee, Sung-Hak Hong, Won Kyung Seong, and Won Nam Kang We have fabricated weakly coupled intergrain nanobridges from MgB films by a focused ion beam (FIB) patterning technique and studied their transition properties. The bridges were nominally 300 nm wide and 100 nm long, and crossed a single grain boundary perpendicularly. The temperature-dependent res ... [Appl. Phys. Lett. 95, 202504 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Terahertz lasing from silicon by infrared Raman scattering on bismuth centersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
S. G. Pavlov, U. Bottger, R. Eichholz, N. V. Abrosimov, H. Riemann et al. Stimulated emission at terahertz frequencies (4.55.8 THz) has been realized by electronic Raman scattering of infrared radiation on bismuth donor centers in silicon at low temperatures. The Stokes shift of the observed laser emission is 40.53 meV which corresponds to the bismuth intracenter transiti ... [Appl. Phys. Lett. 95, 201110 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Nonvolatile memory with CoSiO core-shell nanocrystals as charge storage nodes in floating gateEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Hai Liu, Domingo A. Ferrer, Fahmida Ferdousi, and Sanjay K. Banerjee In this letter, we reported nanocrystal floating gate memory with CoSiO core-shell nanocrystal charge storage nodes. By using a water-in-oil microemulsion scheme, CoSiO core-shell nanocrystals were synthesized and closely packed to achieve high density matrix in the floating gate without aggregation ... [Appl. Phys. Lett. 95, 203112 (2009)] published Wed Nov 18, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 19, 2009 Category: Physics Source Type: journals

Optical nanorod antennas as dispersive one-dimensional FabryPerot resonators for surface plasmonsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Ertugrul Cubukcu and Federico Capasso Resonant optical nanoantennas exhibit a different length scaling due to the surface plasmons compared to their radio frequency counterparts. In this letter, we address this difference by calculating the wavelength-dependent effective mode index n for a cylindrical one-dimensional gold nanowire waveg ... [Appl. Phys. Lett. 95, 201101 (2009)] published Mon Nov 16, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 18, 2009 Category: Physics Source Type: journals

Effects of the alkyl chain length in phosphonic acid self-assembled monolayer gate dielectrics on the performance and stability of low-voltage organic thin-film transistorsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Kenjiro Fukuda, Takanori Hamamoto, Tomoyuki Yokota, Tsuyoshi Sekitani, Ute Zschieschang et al. We have fabricated pentacene organic thin-film transistors (TFTs) using self-assembled monolayers (SAMs) based on alkyl-phosphonic acids with five different alkyl chain lengths as the gate dielectric and investigated the relationship between the SAM chain length and the electrical performance and st ... [Appl. Phys. Lett. 95, 203301 (2009)] published Mon Nov 16, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 18, 2009 Category: Physics Source Type: journals

Fivefold annealing twin in nanocrystalline CuEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
P. Huang, G. Q. Dai, F. Wang, K. W. Xu, and Y. H. Li Fivefold annealing twin has been observed in nanocrystalline Cu at zero external stress. The microstructure of the multifold twins at various annealing temperatures has been examined by transmission electron microscopic in detail. Contrary to the well known sequential twinning mechanism, coherent tw ... [Appl. Phys. Lett. 95, 203101 (2009)] published Mon Nov 16, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 18, 2009 Category: Physics Source Type: journals

Origins of performance in fiber-based organic photovoltaicsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Yuan Li, Wei Zhou, Dan Xue, Jiwen Liu, Eric D. Peterson et al. Using ray tracing and optical path iteration, we present a mathematical model for light transmission, absorption, and loss in fiber-based organic photovoltaics. Simulations based on this model give an optimum incident angle, position, and an optimum aspect ratio in terms of other parameters of the f ... [Appl. Phys. Lett. 95, 203503 (2009)] published Mon Nov 16, 2009. (Source: Applied Physics Letters)
Source: Applied Physics Letters - November 18, 2009 Category: Physics Source Type: journals