Open Access Nano Express

Multiscale modeling and simulation of nanotube-based torsional oscillators

Shaoping Xiao* and Wenyi Hou

Author Affiliations

Department of Mechanical and Industrial Engineering, Center for Computer-Aided Design, The University of Iowa, 3131, Seamans Center, Iowa City, IA, 52242, USA

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Nanoscale Research Letters 2006, 2:54-59  doi:10.1007/s11671-006-9030-8


The electronic version of this article is the complete one and can be found online at:


Received:11 October 2006
Accepted:25 October 2006
Published:28 November 2006

© 2006 to the authors

Abstract

In this paper, we propose the first numerical study of nanotube-based torsional oscillators via developing a new multiscale model. The edge-to-edge technique was employed in this multiscale method to couple the molecular model, i.e., nanotubes, and the continuum model, i.e., the metal paddle. Without losing accuracy, the metal paddle was treated as the rigid body in the continuum model. Torsional oscillators containing (10,0) nanotubes were mainly studied. We considered various initial angles of twist to depict linear/nonlinear characteristics of torsional oscillators. Furthermore, effects of vacancy defects and temperature on mechanisms of nanotube-based torsional oscillators were discussed.

Keywords:
Nanotube; Torsional oscillator; Multiscale; Vacancy defects; Temperature

Nano Express

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Acknowledgments

The authors acknowledge support from the Army Research Office (Contract: # W911NF-06-C-0140) and the National Science Foundation (Grant # 0630153).

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