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김성엽

Kim, Sung Youb
Computational Advanced Nanomechanics Lab.
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Boundary Condition and Strain Effects on the Quality Factors of Single Walled Carbon Nanotubes

Author(s)
Kim, Sung YoubPark, H.S.
Issued Date
2011-05
DOI
10.1166/jctn.2011.1758
URI
https://scholarworks.unist.ac.kr/handle/201301/7360
Fulltext
http://www.ingentaconnect.com/content/asp/jctn/2011/00000008/00000005/art00004;jsessionid=23ww65wmcmbtl.x-ic-live-03
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.
Publisher
AMER SCIENTIFIC PUBLISHERS
ISSN
1546-1955

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