Strain relaxation in monolayer MoS₂ over flexible substrate.

ABSTRACT: In this communication, we demonstrate uniaxial strain relaxation in monolayer (1L) MoS₂ transpires through cracks in both single and double-grain flakes. Chemical vapour deposition (CVD) grown 1L MoS₂ has been transferred onto polyethylene terephthalate (PET) and poly(dimethylsiloxane) (PDMS) substrates for low (∼1%) and high (1-6%) strain measurements. Both Raman and photoluminescence (PL) spectroscopy revealed strain relaxation via cracks in the strain regime of 4-6%. In situ optical micrographs show the formation of large micron-scale cracks along the strain axis and ex situ atomic force microscopy (AFM) images reveal the formation of smaller lateral cracks due to the strain relaxation. Finite element simulation has been employed to estimate th

SUBMITTER: Basu N 

PROVIDER: S-EPMC10230350 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature