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Article: The oscillatory characteristics of a 2C 60/CNT oscillator system
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TitleThe oscillatory characteristics of a 2C 60/CNT oscillator system
 
AuthorsWang, X2
Xin, H3
Leonard, JN4
Chen, G1
Chwang, AT1
Jiang, Q2
 
KeywordsCarbon Nanotube
Energy Dissipation
Fullerene
Ghz Oscillator
Md Simulations
Nano System
 
Issue Date2007
 
PublisherAmerican Scientific Publishers. The Journal's web site is located at http://aspbs.com/jnn/
 
CitationJournal Of Nanoscience And Nanotechnology, 2007, v. 7 n. 4-5, p. 1512-1517 [How to Cite?]
DOI: http://dx.doi.org/10.1166/jnn.2007.334
 
AbstractThe authors have studied, using molecular dynamic (MD) simulations, the oscillatory characteristics of a 2C 60/CNT oscillator system, in which two C 60 fullerenes oscillate inside a single walled carbon nanotube (CNT) in two basic modes, i.e., the symmetric and non-symmetric motions. In the symmetric mode, with each oscillation the two fullerenes move symmetrically from the CNT ends towards the CNT center where they bounce off each other and head back towards the ends. In the non-symmetric mode, the two fullerenes move back and forth inside the CNT crossing the center point of the CNT together with each oscillation. The simulations show that the non-symmetric oscillation mode is stable for the prescribed initial (maximum) velocities up to 300 m/s, while the symmetric oscillation mode however, experiences dynamic instabilities for a prescribed initial (maximum) velocity larger than 250 m/s. The instability takes place as a result of the transfer of energy from the translational to the rotational motion of the fullerenes. This characteristic differentiates 2C 60/CNT oscillators from double-walled CNT oscillators. The rotation is primarily caused by the inter-colliding of the two fullerenes, which subjects the fullerenes to large van der Waals repelling forces. These repelling forces are not necessarily aligned perfectly along the CNT axis nor precisely pointing towards the mass centers of the fullerenes. These misalignments cause the fullerenes to rock around the CNT's axis, while their offsets from the mass centers cause the fullerenes to rotate. The rocking motion, being severely confined by the CNT, does not gain much energy itself, but instead, channels energy from translational to rotational motion. The energy channeling is found to be reversed in some very short time intervals, but the rotational motion always gains energies from the translational motion over a time interval that is long enough at the MD time scale. This feature, contrary to our experiences in the macroscopic world, appears to be unique for such nanoscopic mechanical systems. Copyright © 2007 American Scientific Publishers All rights reserved.
 
ISSN1533-4880
2013 Impact Factor: 1.339
2013 SCImago Journal Rankings: 0.351
 
DOIhttp://dx.doi.org/10.1166/jnn.2007.334
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorWang, X
 
dc.contributor.authorXin, H
 
dc.contributor.authorLeonard, JN
 
dc.contributor.authorChen, G
 
dc.contributor.authorChwang, AT
 
dc.contributor.authorJiang, Q
 
dc.date.accessioned2012-10-08T03:15:25Z
 
dc.date.available2012-10-08T03:15:25Z
 
dc.date.issued2007
 
dc.description.abstractThe authors have studied, using molecular dynamic (MD) simulations, the oscillatory characteristics of a 2C 60/CNT oscillator system, in which two C 60 fullerenes oscillate inside a single walled carbon nanotube (CNT) in two basic modes, i.e., the symmetric and non-symmetric motions. In the symmetric mode, with each oscillation the two fullerenes move symmetrically from the CNT ends towards the CNT center where they bounce off each other and head back towards the ends. In the non-symmetric mode, the two fullerenes move back and forth inside the CNT crossing the center point of the CNT together with each oscillation. The simulations show that the non-symmetric oscillation mode is stable for the prescribed initial (maximum) velocities up to 300 m/s, while the symmetric oscillation mode however, experiences dynamic instabilities for a prescribed initial (maximum) velocity larger than 250 m/s. The instability takes place as a result of the transfer of energy from the translational to the rotational motion of the fullerenes. This characteristic differentiates 2C 60/CNT oscillators from double-walled CNT oscillators. The rotation is primarily caused by the inter-colliding of the two fullerenes, which subjects the fullerenes to large van der Waals repelling forces. These repelling forces are not necessarily aligned perfectly along the CNT axis nor precisely pointing towards the mass centers of the fullerenes. These misalignments cause the fullerenes to rock around the CNT's axis, while their offsets from the mass centers cause the fullerenes to rotate. The rocking motion, being severely confined by the CNT, does not gain much energy itself, but instead, channels energy from translational to rotational motion. The energy channeling is found to be reversed in some very short time intervals, but the rotational motion always gains energies from the translational motion over a time interval that is long enough at the MD time scale. This feature, contrary to our experiences in the macroscopic world, appears to be unique for such nanoscopic mechanical systems. Copyright © 2007 American Scientific Publishers All rights reserved.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of Nanoscience And Nanotechnology, 2007, v. 7 n. 4-5, p. 1512-1517 [How to Cite?]
DOI: http://dx.doi.org/10.1166/jnn.2007.334
 
dc.identifier.citeulike1147450
 
dc.identifier.doihttp://dx.doi.org/10.1166/jnn.2007.334
 
dc.identifier.epage1517
 
dc.identifier.hkuros129990
 
dc.identifier.issn1533-4880
2013 Impact Factor: 1.339
2013 SCImago Journal Rankings: 0.351
 
dc.identifier.issue4-5
 
dc.identifier.pmid17450919
 
dc.identifier.scopuseid_2-s2.0-34447549195
 
dc.identifier.spage1512
 
dc.identifier.urihttp://hdl.handle.net/10722/168128
 
dc.identifier.volume7
 
dc.languageeng
 
dc.publisherAmerican Scientific Publishers. The Journal's web site is located at http://aspbs.com/jnn/
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of Nanoscience and Nanotechnology
 
dc.relation.referencesReferences in Scopus
 
dc.subjectCarbon Nanotube
 
dc.subjectEnergy Dissipation
 
dc.subjectFullerene
 
dc.subjectGhz Oscillator
 
dc.subjectMd Simulations
 
dc.subjectNano System
 
dc.titleThe oscillatory characteristics of a 2C 60/CNT oscillator system
 
dc.typeArticle
 
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<contributor.author>Leonard, JN</contributor.author>
<contributor.author>Chen, G</contributor.author>
<contributor.author>Chwang, AT</contributor.author>
<contributor.author>Jiang, Q</contributor.author>
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Author Affiliations
  1. The University of Hong Kong
  2. University of California, Riverside
  3. University of Arizona
  4. Raytheon