"Tuning the resonant frequency of single-walled carbon nanotube bundle " by Popat Jaroenapibal, David E. Luzzi et al.

Departmental Papers (MSE)

Title

Tuning the resonant frequency of single-walled carbon nanotube bundle oscillators through electron-beam-induced cross-link formations

Author(s)

Popat Jaroenapibal, University of Pennsylvania
David E. Luzzi, University of Pennsylvania
Stephane Evoy, University of Alberta

Document Type

Journal Article

Date of this Version

February 2007

Comments

Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Reprinted from Applied Physics Letters, Volume 90, Article 081912, February 2007, 3 pages.
Publisher URL: http://dx.doi.org/10.1063/1.2472535

Abstract

The authors investigate the effect of electron irradiation on the resonant frequency of single-walled carbon nanotube bundles. Electron beam irradiation was employed to induce the formation of intertube cross-linking. An increase in the resonant frequency was observed at low electron doses as the bending modulus was enhanced by cross-link formation. Higher doses induced amorphization and knock-on damage in the bundle, resulting in an overall reduction of the bending modulus. The effect of stiffness enhancement is more pronounced in larger diameter bundles due to the more compliant initial condition. At 45 nm diameter, an increase in bending modulus of 115% is observed.