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
2011 Impact Factor: 1.563
2011 SCImago Journal Rankings: 0.087
DOIhttp://dx.doi.org/10.1166/jnn.2007.334
ReferencesReferences in Scopus
DC Field
Value
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.issn1533-4880
2011 Impact Factor: 1.563
2011 SCImago Journal Rankings: 0.087
dc.identifier.issue4-5
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
Author Affiliations
  1. The University of Hong Kong
  2. University of California, Riverside
  3. University of Arizona
  4. Raytheon