Results 41 to 50 of about 8,132 (220)

Dual-broadband terahertz absorber based on phase transition characteristics of VO2

Results in Physics, 2022
A dual-broadband absorption metamaterial based on a composite structure consisting of metal and vanadium dioxide is designed and analyzed. By controlling the temperature of vanadium dioxide, the absorption band of the device can be manipulated.
Hao Luo, Hai Liu, Cong Chen, Yue Feng, Peng Gao, Zi Yan Ren, Yu Jia Qiao   +6 more
doaj   +1 more source

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

Advanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas, Ankan Dutta, Shuvendu Das, Abu Musa Abdullah, Wanqing Zhang, Fatema Tuz Zohra, Huanyu Cheng   +6 more
wiley   +1 more source

Competing phases in epitaxial vanadium dioxide at nanoscale [PDF]

APL Materials, 2019
Phase competition in correlated oxides offers tantalizing opportunities as many intriguing physical phenomena occur near the phase transitions. Owing to a sharp metal-insulator transition (MIT) near room temperature, the correlated vanadium dioxide (VO2) exhibits a strong competition between insulating and metallic phases, which is important for ...
Yogesh Sharma, Martin V. Holt, Nouamane Laanait, Xiang Gao, Ilia N. Ivanov, Liam Collins, Changhee Sohn, Zhaoliang Liao, Elizabeth Skoropata, Sergei V. Kalinin, Nina Balke, Gyula Eres, Thomas Z. Ward, Ho Nyung Lee   +13 more
openaire   +3 more sources

How fast can vanadium dioxide neuron-mimicking devices oscillate? Physical mechanisms limiting the frequency of vanadium dioxide oscillators

Neuromorphic Computing and Engineering, 2023
The frequency of vanadium dioxide (VO _2 ) oscillators is a fundamental figure of merit for the realization of neuromorphic circuits called oscillatory neural networks (ONNs) since the high frequency of oscillators ensures low-power consuming, real-time ...
S Carapezzi, A Plews, G Boschetto, A Nejim, S Karg, A Todri-Sanial   +5 more
doaj   +1 more source

Prediction of the Vanadium Content of Molten Iron in a Blast Furnace and the Optimization of Vanadium Extraction

Separations, 2023
The vanadium content of molten iron is an important economic indicator for a vanadium–titanium magnetite smelting blast furnace, and it is of great importance in blast furnace production to be able to accurately predict it and optimize the operation of ...
Hongwei Li, Xin Li, Xiaojie Liu, Xiangping Bu, Shujun Chen, Qing Lyu, Kunming Wang   +6 more
doaj   +1 more source

Enhancing Biogenic Formic Acid Production in the Modified OxFA Process by Acetonitrile Addition

Advanced Science, EarlyView.
In this study, the beneficial effect of using acetonitrile as a co‐solvent in the modified OxFA process is shown, outperforming methanol, demonstrating improved reaction kinetics combined with high selectivity for the HPA‐2 (H5PV2Mo10O40) catalyzed oxidation of xylose to FA.
Jan‐Dominik H. Krueger, Pegah Saedi, Maximilian J. Poller, Alberto Collauto, Jason P. Hallett, David Robinson, Maxie M. Roessler, Jakob Albert   +7 more
wiley   +1 more source

Optical properties of the Vanadium dioxide

JOURNAL OF ADVANCES IN PHYSICS, 2015
The vanadium dioxide is a material thermo chromium which sees its optical properties changing at the time of the transition from the phase of semiconductor state ↔ metal, at a critical temperature of 68°C. The study of the optical properties of a thin layer of VO₂ thickness 82 nm, such as the dielectric function, the index of refraction, the ...
Anouar Jorio, Izeddine Zorkani, Abdesselam Mdaa, Abderrahim Benchaib   +3 more
openaire   +1 more source

Backbone‐Length‐Optimized Inhibitors Deliver Long‐Retention Selectivity in Area‐Selective ALD of VO2

Advanced Science, EarlyView.
Area‐selective VO2 ALD is found to depend critically on inhibitor backbone length, which governs physisorption, chemisorption stability, and packing efficiency in a coupled manner. An intermediate backbone‐length achieves the best long‐retention selectivity, establishing a chemically and geometrically grounded design principle for small‐molecule ...
Hae Lin Yang, Eun Chong Cho, Minchan Kim, Hye In Park, Ga‐young Lee, Seunghwan Lee, Beomseok Kim, Changhwa Jung, Youngkwon Kim, Jin‐Seong Park   +9 more
wiley   +1 more source

Reduction of V4+ from V5+ using polymer as a surfactant for electrochemical applications

International Journal of Electrochemical Science, 2010
Vanadium dioxide nanowires and nanobelts were synthesized from vanadium pentoxide xerogel through a hydrothermal process. V5+ was reduced to V4+ by a polyblend of poly(vinyl pyrrolidone) (PVP) and poly(vinyl alcohol)(PVA), and by poly(vinyl alcohol)(PVA).
V S Reddy Channu, Rudolf Holze, B. Rambabu, Rajamohan R. Kalluru, Quinton L. Williams, Chen Wen   +5 more
doaj   +1 more source

Metal Ion‐Induced Fast Gelation of 2D MnO2 Nanosheets With Cationic Vacancies for Durable Aqueous Zinc‐Ion Batteries

Advanced Science, EarlyView.
We report Mn‐deficient aerogels by inducing the first gelation of MnO2 nanosheets in solution using divalent metal ions as crosslinking agents, thereby inhibiting nanosheet restacking and enhancing surface utilization. Benefiting from abundant Mn vacancies and 3D porous structures, the A‐MnO2 cathode exhibits improved conductivity, fast reaction ...
Yalei Wang, Xinyu Huang, Shulong Chang, Bowen Li, Caichao Ye, Feng Yang, Yahui Xue   +6 more
wiley   +1 more source