Investigating the mechanical properties of GeSn nanowires

Jelena Kosmaca, Raimonds Meija, Mikk Antsov, Gunta Kunakova, Raitis Sondors, Igor Latsunskyi, Emerson Coy, Jessica Doherty, Subhajit Biswas, Justin D. Holmes, Donats Erts

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Germanium tin (GeSn) has been proposed as a promising material for electronic and optical applications due to the formation of a direct band-gap at a Sn content >7 at%. Furthermore, the ability to manipulate the properties of GeSn at the nanoscale will further permit the realisation of advanced mechanical devices. Here we report for the first time the mechanical properties of GeSn nanowires (7.1-9.7 at% Sn) and assess their suitability as nanoelectromechanical (NEM) switches. Electron microscopy analysis showed the nanowires to be single crystalline, with surfaces covered by a thin native amorphous oxide layer. Mechanical resonance and bending tests at different boundary conditions were used to obtain size-dependent Young's moduli and to relate the mechanical characteristics of the alloy nanowires to geometry and Sn incorporation. The mechanical properties of the GeSn nanowires make them highly promising for applications in next generation NEM devices.

Original languageEnglish
Pages (from-to)13612-13619
JournalNanoscale
Volume11
Issue number28
DOIs
Publication statusPublished - 28 Jul 2019
Externally publishedYes

Field of Science

  • 1.3 Physical sciences

Publication Type

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

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