Agradecimentos: S.S was supported by FAME, one of the six centers of STARnet, a semiconductor Research Corporation program sponsored by MARCO and DARPA. Y.M.J. thanks Sao Paulo Research Foundation (FAPESP) (Grant No. 2016/12341-5) for financial support. Y.M.J. and D.S.G. acknowledge the Center for...

Agradecimentos: S.S was supported by FAME, one of the six centers of STARnet, a semiconductor Research Corporation program sponsored by MARCO and DARPA. Y.M.J. thanks Sao Paulo Research Foundation (FAPESP) (Grant No. 2016/12341-5) for financial support. Y.M.J. and D.S.G. acknowledge the Center for Computational Engineering and Sciences at University of Campinas (FAPESP/CEPID Grant No. 2013/08293-7). Microscopy research performed as part of a user proposal at Oak Ridge National Laboratory's Center for Nanophase Materials Sciences (CNMS), which is a U.S. Department of Energy, Office of Science User Facility

Abstract: The mechanical and optical properties generated due to the stacking of different atomically thin materials have made it possible to tune and engineer these materials for next-generation electronics. The understanding of the interlayer interactions in such stacked structures is of...

Abstract: The mechanical and optical properties generated due to the stacking of different atomically thin materials have made it possible to tune and engineer these materials for next-generation electronics. The understanding of the interlayer interactions in such stacked structures is of fundamental interest for structure and property correlation. Here, a combined approach of in situ Raman spectroscopy and mechanical straining along with molecular dynamics (MD) simulations has been used to probe one such interface, namely, the WS2/MoS2 heterostructure. Vertical heterostructures on poly(methyl methacrylate), when flexed, showed signs of decoupling at 1.2% strain. Theoretical calculations showed strain induced stacking changes at 1.75% strain. The sliding characteristics of layers were also investigated using scanning probe microscopy based nanoscratch testing, and the results are further supported by MD simulations. The present study could be used to design future optoelectronic devices based on WS2/MoS2 heterostructures

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2016/12341-5; 2013/08293-7

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