Effect of high-temperature shock-wave compression on few-layer MoS 2, WS2 and MoSe2

K. Vasu, H. S.S.R. Matte, Sharmila N. Shirodkar, V. Jayaram, K. P.J. Reddy, Umesh V. Waghmare, C. N.R. Rao

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Exposure of few-layer MoS2, WS2 and MoSe2 to high-temperature shock waves causes morphological changes and a significant decrease in the interlayer separation between the (0 0 2) planes, the decrease being greatest in MoSe2. Raman spectra show softening of both the A1g and the E2g1 modes initially, followed by a slightly stiffening. Using first-principles density functional theoretical analysis of the response of few-layer MoS2 to shock waves, we propose that a combination of shear and uniaxial compressive deformation leads to flattening of MoS 2 sheets which is responsible for the changes in the vibrational spectra.

Original languageEnglish
Pages (from-to)105-109
Number of pages5
JournalChemical Physics Letters
Volume582
DOIs
StatePublished - 8 Aug 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (all)
  • Physical and Theoretical Chemistry

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