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Total 3421 results found since Jan 2013.
External Fields Assisted Highly Efficient Oxygen Evolution Reaction of Confined 1T ‐VSe2 Ferromagnetic Nanoparticles
Confined 1T-VSe2 ferromagnetic nanoparticles are successfully synthesized by pulsed laser deposition (PLD) and rapid thermal annealing (RTA) techniques. Owing to the confined structure and the spin-related kinetics under external magnetic fields, the confined 1T-VSe2 ferromagnetic nanoparticles exhibit excellent oxygen evolution reaction (OER) performance and remarkable stability. This work provides a promising guideline for spin-related mechanisms in promoting the OER activity of transition metal chalcogenides (TMCs) and boosts the development of field-assisted electrocatalysis. AbstractAs a clean and effective approach, ...
Source: Small - May 5, 2023 Category: Nanotechnology Authors: Mingyue Chen,
Wenda Zhou,
Kun Ye,
Cailei Yuan,
Mengyuan Zhu,
Hao Yu,
Hongzhou Yang,
He Huang,
Yanfei Wu,
Jingyan Zhang,
Xinqi Zheng,
Jianxin Shen,
Xiao Wang,
Shouguo Wang Tags: Research Article Source Type: research
High ‐Dispersive Pd Nanoparticles on Hierarchical N‐Doped Carbon Nanocages to Boost Electrochemical Co2 Reduction to Formate at Low Potential
This study sheds light on the rational design of high-efficient electrocatalysts for advanced energy conversion.
Source: Small - May 4, 2023 Category: Nanotechnology Authors: Junru Zhang,
Yiqun Chen,
Fengfei Xu,
Yan Zhang,
Jingyi Tian,
Yue Guo,
Guanghai Chen,
Xizhang Wang,
Lijun Yang,
Qiang Wu,
Zheng Hu Tags: Research Article Source Type: research
Polymer ‐Grafted, Gold Nanoparticle‐Based Nano‐Capsules as Reversible Colorimetric Tensile Strain Sensors
In this study, we introduce the synthesis of colloidal colorimetric nano-sensors using a simple and readily scalable fabrication method. Colloidal nano sensors are prepared by emulsion-templated assembly of polymer-grafted gold nanoparticles (AuNP). To direct the adsorption of AuNP to the oil-water interface of emulsion droplets, AuNP (≈11nm) are functionalized with thiol-terminated polystyrene (PS,Mn = 11k). These PS-grafted gold nanoparticles are suspended in toluene and subsequently emulsified to form droplets with a diameter of ≈30µm. By evaporating the solvent of the oil-inwater emulsion, we form nanocapsul...
Source: Small - May 4, 2023 Category: Nanotechnology Authors: Jae ‐Hyun Kim,
Joseph Rosenfeld,
Ye Chan Kim,
Sean Choe,
Russell J. Composto,
Daeyeon Lee,
Rémi Dreyfus Tags: Research Article Source Type: research
Room Temperature Synthesis Mediated Porphyrinic NanoMOF Enables Benchmark Electrochemical Biosensing
Nanoparticles of a high-connected Zr(IV)-porphyrinic metal-organic framework (MOF) are rapidly synthesized via a facile, SBU-assisted synthesis strategy at room temperature. Integration of nanoparticles on a conductive indium tin oxide surface affords an electrochemical sensor, Fe-MOF-525(SAS)/ITO. Thanks to distinct particle size effects, Fe-MOF-525(SAS)/ITO delivers record-high uric acid sensing with high sensitivity and low detection limit, forging new ground toward advancing benchmark sensors albeit benign synthesis conditions. AbstractLeveraging size effects, nanoparticles of metal-organic frameworks, nanoMOFs, have r...
Source: Small - May 4, 2023 Category: Nanotechnology Authors: Zhenyu Zhou,
Jun Wang,
Shujin Hou,
Soumya Mukherjee,
Roland A. Fischer Tags: Research Article Source Type: research
Patterning of Hydrophilic and Hydrophobic Gold and Magnetite Nanoparticles by Dip Pen Nanolithography (Small 18/2023)
Dip Pen NanolithographyIn article number2208069, Bart Jan Ravoo and co-workers report the surface patterning of nanoparticles using dip pen nanolithography. Metal and metal oxide nanoparticles functionalized with various organic ligands can be patterned in nanosized clusters. Depending on the polarity of the ligand shell, water or toluene is used as ink solvent. No modification of atomic force microscope (AFM) tip or substrate surface is required.
Source: Small - May 3, 2023 Category: Nanotechnology Authors: Lisa Schlichter,
Florian Bosse,
Bonnie J. Tyler,
Heinrich F. Arlinghaus,
Bart Jan Ravoo Tags: Frontispiece Source Type: research
Catalytic Hydrogenation of CO2 to Formate Using Ruthenium Nanoparticles Immobilized on Supported Ionic Liquid Phases (Small 18/2023)
Ruthenium NanoparticlesIn article number2206806 by Alexis Bordet, Walter Leitner, and co-workers, the aqueous phase hydrogenation of CO2 to formate using Ru nanoparticles immobilized on supported ionic liquid phases (Ru@SILP) is reported. A synergistic enhancement of catalyst activity and productivity is observed for sulfonic acid-functionalized Ru@SILP(SO3H-X) materials, and rationalized by an accelerated desorption of the formate species from the Ru NPs promoted by the presence of ammonium sulfonate species on these catalysts.
Source: Small - May 3, 2023 Category: Nanotechnology Authors: Savarithai Jenani Louis Anandaraj,
Liqun Kang,
Serena DeBeer,
Alexis Bordet,
Walter Leitner Tags: Back Cover Source Type: research
In Vivo NIR ‐II Fluorescence Lifetime Imaging of Whole‐Body Vascular Using High Quantum Yield Lanthanide‐Doped Nanoparticles
Lanthanide-doped nanoparticles (NPs) of β-NaErF4: 2%Ce@NaYbF4@NaYF4 with photoluminescence quantum yield of 50.1% are obtained through multi-ion doping and core –shell structural design. Combined with a homebuilt NIR-II fluorescence lifetime imaging system and these excellent NPs, a fast whole-body vascular fluorescence lifetime imaging in vivo with high signal to ratio can be realized. AbstractSecond near infrared (NIR-II, 1000 –1700 nm) fluorescence lifetime imaging is a powerful tool for biosensing, anti-counterfeiting, and multiplex imaging. However, the low photoluminescence quantum yield (PLQY) of fluorescence ...
Source: Small - May 2, 2023 Category: Nanotechnology Authors: Yongwei Guo,
Jie Hu,
Peiyuan Wang,
Hongyi Yang,
Sisi Liang,
Dejian Chen,
Kunyuan Xu,
Yingping Huang,
Qinglai Wang,
Xiaolong Liu,
Haomiao Zhu Tags: Research Article Source Type: research
Hierarchical and Porous Structures of Carbon Nanotubes ‐Anchored MOF Derivatives Bridged by Carbon Nanocoils as Lightweight and Broadband Microwave Absorbers
A hierarchical and porous structure of CNTs-anchored MOFD bridged by conductive CNC is designed. The components and pore structures of the composites are well-regulated by modulating the pyrolysis temperature and in situ CNT growth time, resulting in the change of corresponding electromagnetic properties. The prepared hierarchical composite provides strong attenuation capacity. AbstractHigh-performance microwave absorption (MA) materials have attracted more and more attention because they can effectively prevent microwave radiation and interference from electronic devices. Herein, a new type of MA composite is constructed ...
Source: Small - May 2, 2023 Category: Nanotechnology Authors: Xueqing Zuo,
Hao Zhang,
Cao Zhou,
Yongpeng Zhao,
Hui Huang,
Ningxuan Wen,
Chen Sun,
Zeng Fan,
Lujun Pan Tags: Research Article Source Type: research
Spatiotemporal Catalytic Nanozymes Microneedle Patches with Opposite Properties for Wound Management
A novel and interesting spatiotemporal catalytic patch with ROS-managing abilities is designed for catalytic therapies in skin-related diseases. Though ROS-mediated method has been developed and used for antibacterial and anti-inflammatory treatment, this strategy provides a new solution for the spatiotemporal management of ROS in the disease microenvironment to realize efficient wound treatment. AbstractReactive oxygen species (ROS)-mediated biological catalysis involves serial programmed enzymatic reactions and plays an important part against infectious diseases; while the spatiotemporal control of catalytic treatment to...
Source: Small - May 2, 2023 Category: Nanotechnology Authors: Jingyang Shan,
Xiaoxuan Zhang,
Lianhui Wang,
Yuanjin Zhao Tags: Research Article Source Type: research
An Overview of Nanoparticle Protein Corona Literature
As nanobiotechnologies have become more ubiquitously used in biotechnology, characterizing the protein corona has been critical to predict their in vivo outcomes. In this paper, the current protein corona literature is analyzed and several key advances and shortcomings are unearthed which are opined important to bring to light on various factors that affect the decoration of protein corona at the surface of nanoparticles. AbstractThe protein corona forms spontaneously on nanoparticle surfaces when nanomaterials are introduced into any biological system/fluid. Reliable characterization of the protein corona is, therefore, a...
Source: Small - April 29, 2023 Category: Nanotechnology Authors: Mohammad J. Hajipour,
Reihaneh Safavi ‐Sohi,
Shahriar Sharifi,
Nouf Mahmoud,
Ali Akbar Ashkarran,
Elizabeth Voke,
Vahid Serpooshan,
Milad Ramezankhani,
Abbas S. Milani,
Markita P. Landry,
Morteza Mahmoudi Tags: Review Source Type: research
Self ‐Assembled Copper‐Based Nanoparticles for Glutathione Activated and Enzymatic Cascade‐Enhanced Ferroptosis and Immunotherapy in Cancer Treatment
Self-assembled copper-based nanoparticles of CACG are developed, which reveal great potential to enhance ferroptosis and immunotherapy by tackling the challenges of excessive glutathione (GSH) and low RROS generation efficiency in cancer treatment. AbstractAs an emerging cancer treatment strategy, ferroptosis is greatly restricted by excessive glutathione (GSH) in tumor microenvironment (TME) and low reactive oxygen species (ROS) generation efficiency. Here, this work designs self-assembled copper-alanine nanoparticles (CACG) loaded with glucose oxidase (GOx) and cinnamaldehyde (Cin) for in situ glutathione activated and e...
Source: Small - April 29, 2023 Category: Nanotechnology Authors: Wen ‐Fang Song,
Jin‐Yue Zeng,
Ping Ji,
Zi‐Yi Han,
Yun‐Xia Sun,
Xian‐Zheng Zhang Tags: Research Article Source Type: research
Dual ‐Wave Acoustofluidic Centrifuge for Ultrafast Concentration of Nanoparticles and Extracellular Vesicles
An acoustofluidic centrifuge for extracellular vesicles (ACEV) is developed to rapidly concentrate biomaterial in the nanoscale range. The device generates dual surface acoustic waves to create complex acoustic fields that aggregate nanoparticles and EVs. The ACEV successfully concentrates 20 nm polystyrene nanospheres and EVs derived from human prostate cancer cells in approximately 105 s and 30 s, respectively. The results demonstrate the potential for the ACEV to revolutionize EV investigations in cancer and other conditions, by providing an improved and faster approach to isolate EVs from complex matrices. AbstractExtr...
Source: Small - April 29, 2023 Category: Nanotechnology Authors: Povilas Dum čius,
Roman Mikhaylov,
Xiaoyan Zhang,
Matthew Bareford,
Mercedes Stringer,
Rachel Errington,
Chao Sun,
Esperanza Gonzalez,
Tomaš Krukovski,
Juan M Falcon‐Perez,
Dongfang Liang,
Yong‐Qing Fu,
Aled Clayton,
Xin Yang Tags: Research Article Source Type: research
Porous Supramolecular Assemblies for Efficient Suzuki Coupling of Aryl Chlorides
In this study, a facile ligand-template approach is adopted to achieve active-site encapsulation by forming supramolecular assemblies; this bestowed the pristine inert counterparts with reactivity, which is further increased upon the construction of a porous framework. Experimental results indicated that the isolation of ligands by the surrounding template units is key to the formation of catalytically active monoligated palladium complexes. Additionally, the construction of porous frameworks using the resulting supramolecular assemblies prevented the decomposition of the Pd complexes into nanoparticles, which drastically ...
Source: Small - April 28, 2023 Category: Nanotechnology Authors: Fang Chen,
Liping Zheng,
Chen Li,
Benlei Wang,
Qing Wu,
Zhifeng Dai,
Sai Wang,
Qi Sun,
Xiangju Meng,
Feng ‐Shou Xiao Tags: Research Article Source Type: research
Key Role of Choline Head Groups in Large Unilamellar Phospholipid Vesicles for the Interaction with and Rupture by Silica Nanoparticles
Disintegration of large unilamellar vesicles (LUVs) with defined composition of physiological membrane phospholipids (PLs) is indicated by release of a fluorescent reporter. Only in the presence of PLs bearing a choline head group, deleterious interactions with silica nanoparticles occur. Thus, tailor-made LUVs enable to understand adverse interactions with advanced materials at the molecular level. AbstractFor highly abundant silica nanomaterials, detrimental effects on proteins and phospholipids are postulated as critical molecular initiating events that involve hydrogen-bonding, hydrophobic, and/or hydrophilic interacti...
Source: Small - April 26, 2023 Category: Nanotechnology Authors: Regina Leibe,
Susanne Fritsch ‐Decker,
Florian Gussmann,
Ane Marit Wagbo,
Parvesh Wadhwani,
Silvia Diabaté,
Wolfgang Wenzel,
Anne S. Ulrich,
Carsten Weiss Tags: Research Article Source Type: research
Advances in Natural Polymer ‐Based Transdermal Drug Delivery Systems for Tumor Therapy
In this review, the mechanism of natural polymer-based transdermal drug delivery (NPTDD) systems such as penetration enhancers, nanoparticles, microneedles, hydrogels and nanofibers and their applications in tumor therapy are highlighted. It can enhance interest in developing NPTDD, guide rational design and fabrication of intelligent NPTDD systems, and provide an ideal solution for NPTDD-related personalized medicine in the future. AbstractAs an alternative to traditional oral and intravenous injections with limited efficacy, transdermal drug delivery (TDD) has shown great promise in tumor treatment. Over the past decade,...
Source: Small - April 26, 2023 Category: Nanotechnology Authors: Weiqiang Han,
Fengyu Liu,
Yuyao Li,
Guoxin Liu,
Hongjuan Li,
Yongqian Xu,
Shiguo Sun Tags: Review Source Type: research
