Large-area synthesis of high-quality and uniform monolayer WS2 on reusable Au foils.

ABSTRACT: Large-area monolayer WS2 is a desirable material for applications in next-generation electronics and optoelectronics. However, the chemical vapour deposition (CVD) with rigid and inert substrates for large-area sample growth suffers from a non-uniform number of layers, small domain size and many defects, and is not compatible with the fabrication process of flexible devices. Here we report the self-limited catalytic surface growth of uniform monolayer WS2 single crystals of millimetre size and large-area films by ambient-pressure CVD on Au. The weak interaction between the WS2 and Au enables the intact transfer of the monolayers to arbitrary substrates using the electrochemical bubbling method without sacrificing Au. The WS2 shows high crystal quality and optical and electrical properties

SUBMITTER: Gao Y 

PROVIDER: S-EPMC4633959 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature