Article Title

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

Authors

Ming Sheng Wang, Key Laboratory on the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
Ifat Kaplan-Ashiri, Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
Xian Long Wei, Key Laboratory on the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
Rita Rosentsveig, Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
Hanoch Daniel Wagner, Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
Reshef Tenne, Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
Lian Mao Peng, Key Laboratory on the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China

Keywords

Inorganic nanotubes, nanomechanics, TEM, SEM

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-fi eldinduced resonance of these nanotubes.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-008-8008-5

Publisher

Tsinghua University Press

Recommended Citation

Ming Sheng Wang,Ifat Kaplan-Ashiri,Xian Long Wei,Rita Rosentsveig,Hanoch Daniel Wagner,Reshef Tenne,Lian Mao Peng, In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes. NanoRes.2008, 1: 22-31