Brittle Fracture of 2D MoSe2

Yingchao Yang; Xing Li; Minru Wen; Emily Hacopian; Weibing Chen; Yongji Gong; Jing Zhang; Bo Li; Wu Zhou; Pulickel M Ajayan; Qing Chen; Ting Zhu; Jun Lou

doi:10.1002/adma.201604201

Brittle Fracture of 2D MoSe₂

Adv Mater. 2017 Jan;29(2). doi: 10.1002/adma.201604201. Epub 2016 Nov 3.

Authors

Yingchao Yang¹, Xing Li^{1

2}, Minru Wen^{3

4}, Emily Hacopian¹, Weibing Chen¹, Yongji Gong¹, Jing Zhang¹, Bo Li¹, Wu Zhou⁵, Pulickel M Ajayan¹, Qing Chen², Ting Zhu⁴, Jun Lou¹

Affiliations

¹ Department of Materials Science and NanoEngineering, Rice University, Houston, TX, 77005, USA.
² Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, 100871, China.
³ Department of Physics, Tsinghua University, Beijing, 100084, China.
⁴ Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
⁵ Materials Science and Technology Division, Oak Ridge National Lab, Oak Ridge, TN, 37831, USA.

PMID: 27809368
DOI: 10.1002/adma.201604201

Abstract

An in situ quantitative tensile testing platform is developed to enable the uniform in-plane loading of a freestanding membrane of 2D materials inside a scanning electron microscope. The in situ tensile testing reveals the brittle fracture of large-area MoSe₂ crystals and measures their fracture strength for the first time.

Keywords: MoSe2; elastic modulus; fracture strength; in situ nanomechanical testing.