Elastic properties of chemical-vapor-deposited monolayer MoS2, WS2, and their bilayer heterostructures

Kai Liu, Qimin Yan, Michelle Chen, Wen Fan, Yinghui Sun, Joonki Suh, Deyi Fu, Sangwook Lee, Jian Zhou, Sefaattin Tongay, Jie Ji, Jeffrey B. Neaton, Junqiao Wu

Research output: Contribution to journalArticlepeer-review

504 Scopus citations


Elastic properties of materials are an important factor in their integration in applications. Chemical vapor deposited (CVD) monolayer semiconductors are proposed as key components in industrial-scale flexible devices and building blocks of two-dimensional (2D) van der Waals heterostructures. However, their mechanical and elastic properties have not been fully characterized. Here we report high 2D elastic moduli of CVD monolayer MoS2 and WS2 (∼170 N/m), which is very close to the value of exfoliated MoS2 monolayers and almost half the value of the strongest material, graphene. The 2D moduli of their bilayer heterostructures are lower than the sum of 2D modulus of each layer but comparable to the corresponding bilayer homostructure, implying similar interactions between the hetero monolayers as between homo monolayers. These results not only provide deep insight into understanding interlayer interactions in 2D van der Waals structures but also potentially allow engineering of their elastic properties as desired.

Original languageEnglish (US)
Pages (from-to)5097-5103
Number of pages7
JournalNano Letters
Issue number9
StatePublished - Sep 10 2014
Externally publishedYes


  • Molybdenum disulfide
  • elastic modulus
  • heterostructures
  • monolayer
  • tungsten disulfide

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


Dive into the research topics of 'Elastic properties of chemical-vapor-deposited monolayer MoS2, WS2, and their bilayer heterostructures'. Together they form a unique fingerprint.

Cite this