Nanomechanical cleavage of molybdenum disulphide atomic layers

Dai-Ming Tang, Dmitry G. Kvashnin, Sina Najmaei, Yoshio Bando, Koji Kimoto, Pekka Koskinen, Pulickel M. Ajayan, Boris I. Yakobson, Pavel B. Sorokin, Jun Lou () and Dmitri Golberg ()
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Dai-Ming Tang: International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS)
Dmitry G. Kvashnin: National University of Science and Technology MISiS
Sina Najmaei: Rice University
Yoshio Bando: World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Koji Kimoto: Surface Physics and Structure Unit, National Institute for Materials Science (NIMS)
Pekka Koskinen: NanoScience Center, University of Jyväskylä
Pulickel M. Ajayan: Rice University
Boris I. Yakobson: Rice University
Pavel B. Sorokin: National University of Science and Technology MISiS
Jun Lou: Rice University
Dmitri Golberg: World Premier International (WPI) Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract The discovery of two-dimensional materials became possible due to the mechanical cleavage technique. Despite its simplicity, the as-cleaved materials demonstrated surprising macro-continuity, high crystalline quality and extraordinary mechanical and electrical properties that triggered global research interest. Here such cleavage processes and associated mechanical behaviours are investigated by a direct in situ transmission electron microscopy probing technique, using atomically thin molybdenum disulphide layers as a model material. Our technique demonstrates layer number selective cleavage, from a monolayer to double layer and up to 23 atomic layers. In situ observations combined with molecular dynamics simulations reveal unique layer-dependent bending behaviours, from spontaneous rippling (

Date: 2014
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DOI: 10.1038/ncomms4631

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