Synthesis of tungsten ditelluride thin films and highly crystalline nanobelts from pre-deposited reactants

作     者：John B.Mc Manus Cansu Ilhan Bastien Balsamo Clive Downing Conor P.Cullen Tanja Stimpel‑Lindner Graeme Cunningham Lisanne Peters Lewys Jones Daragh Mullarkey Igor V.Shvets Georg S.Duesberg Niall McEvoy 

作者机构：School of ChemistryTrinity College DublinDublin 2 D02 PN40Ireland AMBER CentreCRANN InstituteTrinity College DublinDublin 2 D02 PN40Ireland SIGMA ClermontUniversitéClermont Auvergne63000 Clermont–FerrandFrance Institute of PhysicsEIT 2Faculty of Electrical Engineering and Information TechnologyUniversität der Bundeswehr München85579 NeubibergGermany School of PhysicsTrinity College DublinDublin 2 D02 PN40Ireland 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2020年第2卷第3期

页      面：321-334页

核心收录：

学科分类：07[理学] 08[工学] 070205[理学-凝聚态物理] 0804[工学-仪器科学与技术] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：This work was financially supported by Science Foundation Ireland(SFI,grant numbers:15/SIRG/3329,12/RC/2278_P2,PI_15/IA/3131) the Irish Research Council(Project 204486,Award 13653) Science Foundation Ireland and the Royal Society Fellowship(URF/RI/191637) The SEM and(S)TEM imaging for this project was carried out at the Advanced Microscopy Laboratory(AML),Trinity College Dublin,Ireland.The AML is an SFI supported imaging and analysis centre,part of the CRANN Institute and affiliated to the AMBER centre.G.S.D and T S-L acknowledge the European Commission under the project Graphene Flagship(Grant No.881603) the German Ministry of Education and Research(BMBF)under ACDC(Grant No.13N15100) 

主　　题：Two-dimensional materials Tungsten ditelluride Film conversion Electrodeposition Nanoelectronics 

摘      要：Tungsten ditelluride(WTe_(2))is a layered transition metal dichalcogenide(TMD)that has attracted increasing research inter-est in recent ***_(2) has demonstrated large non-saturating magnetoresistance,potential for spintronic applications and promise as a type-II Weyl *** majority of works on WTe_(2) have relied on mechanically exfoliated flakes from chemical vapour transport(CVT)-grown crystals for their *** producing high-quality samples,this method is hindered by several disadvantages including long synthesis time,high-temperature annealing and an inherent lack of *** this work,a synthesis method is demonstrated that allows the production of large-area polycrystalline films of WTe_(2).This is achieved by the reaction of pre-deposited films of W and Te at a relatively low temperature of 550℃.Sputter X-ray photoelectron spectroscopy reveals the rapid but self-limiting nature of the oxidation of these WTe_(2) films in ambient *** WTe_(2) films are composed of areas of micrometre-sized nanobelts that can be isolated and offer potential as an alternative to CVT-grown *** nanobelts are highly crystalline with low defect densities indicated by transmission electron microscopy and show promising initial electrical results.