Nanotube oscillator based on a short single-walled carbon nanotube bundle

Kang, Jeong Won; Song, Ki Oh; Hwang, Ho Jung; Jiang, Qing

doi:10.1088/0957-4484/17/9/030

Cited by 77 publications

(67 citation statements)

References 72 publications

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“…A comparison of the results of the present model with the molecular dynamics study of Kang et al (2006) shows reasonable overall agreement, considering the assumptions of the model presented here. First, our model is one of mechanics only and takes no account of thermal effects.…”

Section: (B ) Oscillatory Frequencysupporting

confidence: 73%

Mechanics of nanotubes oscillating in carbon nanotube bundles

2008

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Carbon nanotubes are nanostructures that promise much in the area of constructing nanoscale devices due to their enhanced mechanical, electrical and thermal properties. In this paper, we examine a gigahertz oscillator that comprises a carbon nanotube oscillating in a uniform concentric ring or bundle of carbon nanotubes. A number of existing results for nanotube oscillators are employed to analyse the design considerations of optimizing such a device, and significant new results are also derived. These include a new analytical expression for the interaction per unit length of two parallel carbon nanotubes involving the Appell hypergeometric functions. This expression is employed to precisely determine the relationship between the bundle radius and the radii of the nanotubes forming the bundle. Furthermore, several pragmatic approximations are also given, including the relationships between the bundle radius and the constituent nanotube radius and the oscillating tube radius and the bundle nanotube radius. We also present a simplified analysis of the force and energy for a nanotube oscillating in a nanotube bundle leading to an expression for the oscillating frequency and the maximum oscillating frequency, including constraints on configurations under which this maximum is possible.

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Section: (B ) Oscillatory Frequencysupporting

confidence: 73%

Mechanics of nanotubes oscillating in carbon nanotube bundles

2008

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“…Soon after the discovery of CNTs, different types of them were synthesized such as single-walled and multiwalled CNTs, as well as CNT bundles. In 2006, Kang and coworkers described a nanotube bundle as aligned tubes in a triangular lattice which can form hexagonal rings (Kang et al 2006). CNT bundles can improve the electrical, mechanical, and thermal properties (Bandaru 2007;Lau et al 2005) as well as graphene can do.…”

Section: Introductionmentioning

confidence: 99%

Review on carbon nanotubes and carbon nanotube bundles for gas/ion separation and water purification studied by molecular dynamics simulation

Fatemi

Foroutan

2015

Int. J. Environ. Sci. Technol.

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Water and air pollutants have huge impacts on the entire living system. In addition, the newly emerging nanopollutants, increasing global warming, and consequent climate changes are posing major threats to the freshwater or fresh air availability. This has made it urgent to invent an appropriate water/air treatment technology that removes nanopollutants and also desalinates water to a significant extent. Carbon-based nanomaterials have generated marvelous interest in a wide range of research activities due to their high adsorption capacities. Carbon nanotubes, carbon nanotube bundles, and related materials have potential applications in gas/ion separation and water purification. Recently, gas/ion separation and water purification through carbon-based nanomaterials have received increasing attention. This review summarizes the properties of carbon nanotubes and carbon nanotube bundles related to gas separation, ion separation, and water purification using molecular dynamics simulations. Membranes-based carbon nanomaterials show promise of water purification and gas separation. These attractive properties of carbon nanotubes-based and carbon nanotube bundles-based nanomaterials make them proper candidates for gas separation, gas molecular-sieving processes, and desalination purposes in nanoscale dimensions.

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“…From an analysis in [1], there are limitations on L, L 0 and the minimum extrusion distance d min which gives rise to f max (6), and these limitations can be written succinctly as Upon ignoring energy dissipations and thermal effects during the oscillation, we find that our model gives reasonable results as compared with the molecular dynamics studies of Kang et al [11] (for more details see Cox et al [1] …”

Section: B Oscillating Nanotubes In Bundlesmentioning

confidence: 63%

“…In this paper, we adopt similar techniques to those in [9,10] for a new oscillator, the so-called bundle oscillators, for which the inner oscillating molecules are either a C 60 fullerene or a singlewalled carbon nanotube. We note that the nanotube-bundle oscillators have previously been studied by Kang et al [11] using molecular dynamics simulations. However, here and in [1,2] a more general definition of a bundle is adopted than that of Kang et al [11].…”

mentioning

confidence: 88%

“…We note that the nanotube-bundle oscillators have previously been studied by Kang et al [11] using molecular dynamics simulations. However, here and in [1,2] a more general definition of a bundle is adopted than that of Kang et al [11]. Here we consider a bundle to comprise an integral number N of carbon nanotubes aligned parallel to and equidistant from a common axis, which is termed the bundle axis.…”

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confidence: 88%

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Carbon molecules oscillating in carbon nanotube bundles

Thamwattana

Cox

Hill

2008

2008 International Conference on Nanoscience and Nanotechnology

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Fullerenes C 60 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 multiwalled 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 C 60 fullerene oscillating inside a nanotube, we also consider the case of a C 60 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 C 60 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]. Abstract-Fullerenes C 60 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 C 60 fullerene oscillating inside a nanotube, we also consider the case of a C 60 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 C 60 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 p...

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Nanotube oscillator based on a short single-walled carbon nanotube bundle

Cited by 77 publications

References 72 publications

Mechanics of nanotubes oscillating in carbon nanotube bundles

Mechanics of nanotubes oscillating in carbon nanotube bundles

Review on carbon nanotubes and carbon nanotube bundles for gas/ion separation and water purification studied by molecular dynamics simulation

Carbon molecules oscillating in carbon nanotube bundles

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