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Article: The oscillatory characteristics of a 2C 60/CNT oscillator system

TitleThe oscillatory characteristics of a 2C 60/CNT oscillator system
Authors
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/
Citation
Journal Of Nanoscience And Nanotechnology, 2007, v. 7 n. 4-5, p. 1512-1517 How to Cite?
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.
Persistent Identifierhttp://hdl.handle.net/10722/168128
ISSN
2015 Impact Factor: 1.338
2015 SCImago Journal Rankings: 0.358
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Xen_US
dc.contributor.authorXin, Hen_US
dc.contributor.authorLeonard, JNen_US
dc.contributor.authorChen, Gen_US
dc.contributor.authorChwang, ATen_US
dc.contributor.authorJiang, Qen_US
dc.date.accessioned2012-10-08T03:15:25Z-
dc.date.available2012-10-08T03:15:25Z-
dc.date.issued2007en_US
dc.identifier.citationJournal Of Nanoscience And Nanotechnology, 2007, v. 7 n. 4-5, p. 1512-1517en_US
dc.identifier.issn1533-4880en_US
dc.identifier.urihttp://hdl.handle.net/10722/168128-
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.en_US
dc.languageengen_US
dc.publisherAmerican Scientific Publishers. The Journal's web site is located at http://aspbs.com/jnn/en_US
dc.relation.ispartofJournal of Nanoscience and Nanotechnologyen_US
dc.subjectCarbon Nanotubeen_US
dc.subjectEnergy Dissipationen_US
dc.subjectFullereneen_US
dc.subjectGhz Oscillatoren_US
dc.subjectMd Simulationsen_US
dc.subjectNano Systemen_US
dc.titleThe oscillatory characteristics of a 2C 60/CNT oscillator systemen_US
dc.typeArticleen_US
dc.identifier.emailChen, G:ghc@yangtze.hku.hken_US
dc.identifier.authorityChen, G=rp00671en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1166/jnn.2007.334en_US
dc.identifier.pmid17450919-
dc.identifier.scopuseid_2-s2.0-34447549195en_US
dc.identifier.hkuros129990-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34447549195&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume7en_US
dc.identifier.issue4-5en_US
dc.identifier.spage1512en_US
dc.identifier.epage1517en_US
dc.identifier.isiWOS:000245142200040-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridWang, X=36079802100en_US
dc.identifier.scopusauthoridXin, H=7103206891en_US
dc.identifier.scopusauthoridLeonard, JN=23972780700en_US
dc.identifier.scopusauthoridChen, G=35253368600en_US
dc.identifier.scopusauthoridChwang, AT=7005883964en_US
dc.identifier.scopusauthoridJiang, Q=7402523531en_US
dc.identifier.citeulike1147450-

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