Long-range linear elasticity and mechanical instability of self-scrolling binormal nanohelices under a uniaxial load

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

14 Scopus Citations
View graph of relations

Author(s)

  • L. Dai
  • L. Zhang
  • W. Z. Shen
  • X. B. Zhang
  • Z. Z. Ye
  • B. J. Nelson

Detail(s)

Original languageEnglish
Pages (from-to)4301-4306
Journal / PublicationNanoscale
Volume3
Issue number10
Online published8 Sep 2011
Publication statusPublished - 1 Oct 2011
Externally publishedYes

Abstract

Mechanical properties of self-scrolling binormal nanohelices with a rectangular cross-section are investigated under uniaxial tensile and compressive loads using nanorobotic manipulation and Cosserat curve theory. Stretching experiments demonstrate that small-pitch nanohelices have an exceptionally large linear elasticity region and excellent mechanical stability, which are attributed to their structural flexibility based on an analytical model. In comparison between helices with a circular, square and rectangular cross-section, modeling results indicate that, while the binormal helical structure is stretched with a large strain, the stress on the material remains low. This is of particular significance for such applications as elastic components in micro-/nanoelectromechanical systems (MEMS/NEMS). The mechanical instability of a self-scrolling nanohelix under compressive load is also investigated, and the low critical load for buckling suggests that the self-scrolling nanohelices are more suitable for extension springs in MEMS/NEMS.

Citation Format(s)

Long-range linear elasticity and mechanical instability of self-scrolling binormal nanohelices under a uniaxial load. / Dai, L.; Zhang, L.; Dong, L. X.; Shen, W. Z.; Zhang, X. B.; Ye, Z. Z.; Nelson, B. J.

In: Nanoscale, Vol. 3, No. 10, 01.10.2011, p. 4301-4306.

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