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- W3159604899 abstract "Transition metal dichalcogenides (TMDCs) monolayers have attracted intense interests owing to their unique layer-dependent electrical and optical properties, electrocatalytic active properties, and crystal structure tunability, which show great potential for electronics, optoelectronics, valleytronics, spintronics and catalysis applications.1-5 However, the field effect transistors based on layered TMDCs is often plagued by issues such as low field effect mobility and low on/off current ratio due to the high contact resistance at the 2D-semiconductor/ bulk-metal interface.4,5 Recent efforts based on phase transition surface molecular doping, and in-situ atomistic substitutional doping in 2D semiconductors have been shown to allow enhanced control of the types of majority charge carriers and also to achieve modulation of their band structure, which are the key steps towards high-performance 2D-semiconductor-based electronics, optoelectronics and electrocatalysis devices.6-9 However, an in-situ transition metal doping strategy for uniform and large-area chemical vapor deposited 2D semiconductors remains a formidable challenge. Here we synthesize highly uniform niobium substituted tungsten disulfides (NbWS2) monolayer, with a doping concentration of nearly 7 % and sizes reaching 100 μm, through a metal dopant precursor route, using salt-catalyzed chemical vapor deposition (CVD). Our results reveal unusual effects in the structural, optical, electronic and electrocatalysis characteristics of Nb-WS2 monolayer. The Nb dopants readily induce a band restructuring effect, providing the most active site with a hydrogen adsorption energy of 0.175 eV. The combined advantages of the unusual physics and chemistry by in-situ CVD doping technique open the possibility in designing 2D-material-based electronics and catalysts of novel functionalities." @default.
- W3159604899 created "2021-05-10" @default.
- W3159604899 creator A5031615528 @default.
- W3159604899 date "2020-01-01" @default.
- W3159604899 modified "2023-09-23" @default.
- W3159604899 title "High-Concentration Niobium-Substituted WS2 Basal Domains with Reconfigured Electronics Band Structure for Hydrogen Evolution Reaction" @default.
- W3159604899 hasPublicationYear "2020" @default.
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