Nano Research

, 1:22 | Cite as

In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes

  • Ming Sheng Wang
  • Ifat Kaplan-Ashiri
  • Xian Long Wei
  • Rita Rosentsveig
  • Hanoch Daniel Wagner
  • Reshef Tenne
  • Lian Mao Peng
Open Access
Research Article

Abstract

The mechanical properties of individual WS2 nanotubes were investigated and directly related to their atomic structure details by in situ transmission electron microscope measurements. A brittle mode deformation was observed in bending tests of short (ca. 1 μm in length) multilayer nanotubes. This mode can be related to the atomic structure of their shells. In addition, longer nanotubes (6-7μm in length) were deformed in situ scanning electron microscope, but no plastic deformation was detected. A “sword-in-sheath” fracture mechanism was revealed in tensile loading of a nanotube, and the sliding of inner shells inside the outermost shell was imaged “on-line”. Furthermore, bending modulus of 217 GPa was obtained from measurements of the electric-fieldinduced resonance of these nanotubes.

Keywords

Inorganic nanotubes nanomechanics TEM SEM 

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Copyright information

© Tsinghua Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Ming Sheng Wang
    • 1
  • Ifat Kaplan-Ashiri
    • 2
  • Xian Long Wei
    • 1
  • Rita Rosentsveig
    • 2
  • Hanoch Daniel Wagner
    • 2
  • Reshef Tenne
    • 2
  • Lian Mao Peng
    • 1
  1. 1.Key Laboratory on the Physics and Chemistry of Nanodevices and Department of ElectronicsPeking UniversityBeijingChina
  2. 2.Department of Materials and InterfacesWeizmann Institute of ScienceRehovotIsrael

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