Elasticity and yield strength of pentagonal silver nanowires: In situ bending tests

Sergei Vlassov*, Boris Polyakov, Leonid M. Dorogin, Mikk Antsov, Magnus Mets, Madis Umalas, Rando Saar, Rünno Lõhmus, Ilmar Kink

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

50 Citations (Scopus)

Abstract

This paper reports in situ mechanical characterization of silver nanowires (Ag NWs) inside a scanning electron microscope using a cantilevered beam bending technique. Measurements consisted in controlled bending of a cantilevered NW by the tip of an atomic force microscope glued to the force sensor. Relatively high degree of elasticity followed by either plastic deformation or fracture was observed in bending experiments. Experimental data were numerically fitted into the model based on the elastic beam theory and values of Young modulus and yield strength were extracted. Measurements were performed on twenty Ag NWs with diameters from 76 nm to 211 nm. Average Young modulus and yield strength were found to be 90 GPa and 4.8 GPa respectively. In addition, fatigue tests with several millions of cycles were performed and high fatigue resistance of Ag NWs was demonstrated.

Original languageEnglish
Pages (from-to)1026-1031
Number of pages6
JournalMaterials chemistry and physics
Volume143
Issue number3
DOIs
Publication statusPublished - 14 Feb 2014
Externally publishedYes

Keywords

  • Elastic properties
  • Electron microscopy
  • Fatigue
  • Fracture
  • Mechanical testing
  • n/a OA procedure

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