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Type: Conference paper
Title: Carbon molecules oscillating in carbon nanotube bundles
Author: Thamwattana, N.
Cox, B.
Hill, J.
Citation: Proceedings of the International Conference on Nanoscience and Nanotechnology, 2008: pp.230-233
Publisher: IEEE
Publisher Place: Online
Issue Date: 2008
ISBN: 1424415047
Conference Name: International Conference on Nanoscience and Nanotechnology (2009 : Melbourne, Australia)
Statement of
Ngamta Thamwattana, Barry J. Cox and James M. Hill
Abstract: Fullerenes C60 and carbon nanotubes are of considerable interest to researchers from many scientific areas due to their unique electronic and mechanical properties. One application of these carbon nanostructures that has recently attracted much attention is the creation of an oscillator that operates in the gigahertz range frequency. A number of studies have found that the sliding of the inner-shell inside the outershell of a multi-walled carbon nanotube can generate gigahertz oscillatory frequencies. In this paper, we investigate the mechanics of a gigahertz oscillator comprising a carbon nanotube oscillating within the centre of a uniform concentric ring or bundle of carbon nanotubes. Since much higher frequencies can be generated from a C60 fullerene oscillating inside a nanotube, we also consider the case of a C60 fullerene oscillating within a bundle of carbon nanotubes. Using the Lennard-Jones potential and the continuum approach, we obtain a relation between the bundle radius and the radii of the nanotubes forming the bundle, as well as the optimum bundle size which gives rise to the maximum oscillatory frequency for both the C60 and the nanotube bundle oscillators. While previous studies in this area have been undertaken through molecular dynamics simulations, this paper emphasizes the use of applied mathematical modelling techniques which provides considerable insight into the underlying mechanisms. The paper presents a synopsis of the major results derived in detail by the present authors in [1, 2].
Keywords: component
carbon nanotubes
nanotube bundles
gigahertz oscillators
Lennard-Jones potential
Rights: Copyright 2008 IEEE
DOI: 10.1109/ICONN.2008.4639289
Appears in Collections:Aurora harvest
Mathematical Sciences publications

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