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Nano Research 2008, 1(1): 22-31 https://doi.org/10.1007/s12274-008-8008-5
Research Article | Open Access | Issue | Published: 12 July 2008

In Situ TEM Measurements of the Mechanical Properties and Behavior of WS2 Nanotubes

Show Author's Information Ming Sheng Wang1,  Ifat Kaplan-Ashiri2,  Xian Long Wei1,  Rita Rosentsveig2,  Hanoch Daniel Wagner2,  Reshef Tenne2( ),  Lian Mao Peng1
Key Laboratory on the Physics and Chemistry of Nanodevices and Department of ElectronicsPeking UniversityBeijing100871China
Department of Materials and InterfacesWeizmann Institute of ScienceRehovot76100Israel
Keywords:
TEM, Inorganic nanotubes, nanomechanics, SEM
Cite this article:
Wang MS, Kaplan-Ashiri I, Wei XL, et al. In Situ TEM Measurements of the Mechanical Properties and Behavior of WS2 Nanotubes. Nano Research, 2008, 1(1): 22-31. https://doi.org/10.1007/s12274-008-8008-5
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Abstract Full text About this article

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-field-induced resonance of these nanotubes.


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About this article

In Situ TEM Measurements of the Mechanical Properties and Behavior of WS2 Nanotubes

Show Author's information Ming Sheng Wang1, Ifat Kaplan-Ashiri2, Xian Long Wei1, Rita Rosentsveig2, Hanoch Daniel Wagner2, Reshef Tenne2( ), Lian Mao Peng1
Key Laboratory on the Physics and Chemistry of Nanodevices and Department of ElectronicsPeking UniversityBeijing100871China
Department of Materials and InterfacesWeizmann Institute of ScienceRehovot76100Israel

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-field-induced resonance of these nanotubes.

Keywords: TEM, Inorganic nanotubes, nanomechanics, SEM

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Publication history

Received: 28 April 2008
Revised: 25 May 2008
Accepted: 25 May 2008
Published: 12 July 2008
Issue date: January 2008

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© Tsinghua Press and Springer-Verlag 2008

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