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Kim, Sung Youb
Computational Advanced Nanomechanics (CAN) Lab
Research Interests
  • Computational Mechanics
  • Nanomechanics
  • Molecular Dynamics
  • FEM

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Boundary Condition and Strain Effects on the Quality Factors of Single Walled Carbon Nanotubes

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Title
Boundary Condition and Strain Effects on the Quality Factors of Single Walled Carbon Nanotubes
Author
Kim, Sung YoubPark, H.S.
Keywords
Boundary conditions; Nanotubes; Quality factor; Strain
Issue Date
2011-05
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE, v.8, no.5, pp.814 - 819
Abstract
We utilize classical molecular dynamics to study energy dissipation (the Q-factors) of carbon nanotube-based nanoresonators undergoing flexural oscillations. Specifically, we have studied the difference in Q-factors of nanotubes with fixed/fixed and fixed/free boundary conditions. In doing so, we have found that fixed/fixed nanotubes have significantly higher Q-factors, particularly at low temperatures. Furthermore, we have found that mechanical strain can be utilized to enhance the Q-factors of fixed/fixed nanotubes by factors of 2-4 across a range of temperatures for tensile strains ranging from 0 to 6%. The results collectively indicate that fixed/fixed carbon nanotubes should be preferable for NEMS applications at low temperature due to a combination of inherently higher Q-factors, and the fact that the Q-factors can be further improved through the application of tensile strain.
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DOI
10.1166/jctn.2011.1758
ISSN
1546-1955
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