Revealing the anomalous tensile properties of WS2 nanotubes by in situ transmission electron microscopy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Dai-Ming Tang
  • Xianlong Wei
  • Ming-Sheng Wang
  • Naoyuki Kawamoto
  • Yoshio Bando
  • Masanori Mitome
  • Alla Zak
  • Reshef Tenne
  • Dmitri Golberg

Detail(s)

Original languageEnglish
Pages (from-to)1034-1040
Journal / PublicationNano Letters
Volume13
Issue number3
Publication statusPublished - 13 Mar 2013
Externally publishedYes

Abstract

Mechanical properties and fracture behaviors of multiwalled WS2 nanotubes produced by large scale fluidized bed method were investigated under uniaxial tension using in situ transmission electron microscopy probing; these were directly correlated to the nanotube atomic structures. The tubes with the average outer diameter ∼40 nm sustained tensile force of ∼2949 nN and revealed fracture strength of ∼11.8 GPa. Surprisingly, these rather thick WS2 nanotubes could bear much higher loadings than the thin WS 2 nanotubes with almost "defect-free" structures studied previously. In addition, the fracture strength of the "thick" nanotubes did not show common size dependent degradation when the tube diameters increased from ∼20 to ∼60 nm. HRTEM characterizations and real time observations revealed that the anomalous tensile properties are related to the intershell cross-linking and geometric constraints from the inverted cone-shaped tube cap structures, which resulted in the multishell loading and fracturing. © 2013 American Chemical Society.

Research Area(s)

  • cross-linking, defect, in situ microscopy, mechanical properties, tensile, WS2 nanotubes

Citation Format(s)

Revealing the anomalous tensile properties of WS2 nanotubes by in situ transmission electron microscopy. / Tang, Dai-Ming; Wei, Xianlong; Wang, Ming-Sheng; Kawamoto, Naoyuki; Bando, Yoshio; Zhi, Chunyi; Mitome, Masanori; Zak, Alla; Tenne, Reshef; Golberg, Dmitri.

In: Nano Letters, Vol. 13, No. 3, 13.03.2013, p. 1034-1040.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review