Journal article

Strain Relaxation of Monolayer WS2 on Plastic Substrate

Qianhui Zhang, Zhenyue Chang, Guanzhong Xu, Ziyu Wang, Yupeng Zhang, Zai-Quan Xu, Shujian Chen, Qiaoliang Bao, Jefferson Zhe Liu, Yui-Wing Mai, Wenhui Duan, Michael S Fuhrer, Changxi Zheng

Advanced Functional Materials | WILEY-V C H VERLAG GMBH | Published : 2016

Abstract

Strain-dependent electrical and optical properties of atomically thin transition metal dichalcogenides may be useful in sensing applications. However, the question of how strain relaxes in atomically thin materials remains not well understood. Herein, the strain relaxation of triangular WS deposited on polydimethylsiloxane substrate is investigated. The photoluminescence of trions (X ) and excitons (X ) undergoes linear redshifts of ≈20 meV when the substrate tensile strain increases from 0 to 0.16. However, when the substrate strain further increases from 0.16 to 0.32, the redshifts cease due to strain relaxation in WS . The strain relaxation occurs through formation of wrinkles in the WS ..

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University of Melbourne Researchers

Grants

Awarded by ARC


Awarded by ARC DECRA


Awarded by Youth 973 program


Funding Acknowledgements

W.H.D. acknowledges support from ARC (DP160100119 and FL 120100067). C.Z. acknowledges support from ARC DECRA (DE140101555). M.S.F. acknowledges support from ARC (DP150103837 and FL120100038). Q.B. acknowledges support from the Youth 973 program (2015CB932700) and ARC (DP140101501 and FT150100450). This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF).