Control of the motion of nanoelectromechanical systems based on carbon nanotubes

Ershova, O.; Lozovik, Yu. E.; Popov, Andrey M.; Bubel, O. N.; Poklonski, N. A.; Kislyakov, Е. F.

doi:10.1134/s1063783407100332

Cited by 8 publications

(11 citation statements)

References 30 publications

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“…We further demonstrate that the bridged-CNS-based nano-oscillators can be excited and driven by an external electric field, a crucial feature to enable their potential application in ultrafast NEMS devices. For the MWCNT-based nano-oscillators, it has been proposed that by inducing net charge [ 20 ] or electric dipole [ 18 ] into the inner tube, the carbon atoms in the charged/polarized inner tube are subjected to electrostatic capacitive force in an external electric field, which could be potentially used to initialize the oscillation. Controlled charging/polarization of the inner tube of an MWCNT requires manipulation with sub-nanometer precision, thus remains rather challenging to achieve experimentally.…”

Section: Resultsmentioning

confidence: 99%

Ultrafast nano-oscillators based on interlayer-bridged carbon nanoscrolls

Zhang

2011

Nanoscale Res Lett

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We demonstrate a viable approach to fabricating ultrafast axial nano-oscillators based on carbon nanoscrolls (CNSs) using molecular dynamics simulations. Initiated by a single-walled carbon nanotube (CNT), a monolayer graphene can continuously scroll into a CNS with the CNT housed inside. The CNT inside the CNS can oscillate along axial direction at a natural frequency of tens of gigahertz. We demonstrate an effective strategy to reduce the dissipation of the CNS-based nano-oscillator by covalently bridging the carbon layers in the CNS. We further demonstrate that such a CNS-based nano-oscillator can be excited and driven by an external AC electric field, and oscillate at more than 100 GHz. The CNS-based nano-oscillators not only offer a feasible pathway toward ultrafast nano-devices but also hold promise to enable nanoscale energy transduction, harnessing, and storage (e.g., from electric to mechanical).

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Section: Resultsmentioning

confidence: 99%

Ultrafast nano-oscillators based on interlayer-bridged carbon nanoscrolls

Zhang

2011

Nanoscale Res Lett

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“…We considered several DWNT oscillators of the length from 2.4 to 6.3 nm. The nanotube walls were equal in length [15]. Both ends of the outer wall were open and not functionalized, so that the telescopic extension of the inner wall was possible at both ends.…”

Section: Methodsmentioning

confidence: 99%

“…The relative dispersion of the energy loss E Δ over a half-period for the defect-free 3.1 nm (5,5)@(10,10) nanotube-based oscillator is about 1.5 at a temperature of 300 K. With the same initial telescopic extension of the inner wall of 30% of the nanotube length, the relative dispersion of the energy loss E Δ over a half-period is below 0.5 for the oscillator that is longer than 30 nm. We suppose that the fluctuations can influence the possibility of the controllable operation mode of the gigahertz oscillator (this operation mode is considered in [15]). Thus, the fluctuations impose restrictions on the minimum size of the nanotube-based NEMS that may be used in applications.…”

Section: Fluctuations In Nemsmentioning

confidence: 99%

“…There are two possible ways of the practical realization of the nanotube oscillator: 1) to choose the system parameters that provide a high value of the Q-factor and, therefore, a slow frequency drift, 2) to sustain the oscillation amplitude by an external force. For the second case, it was shown that this external force is inversely proportional to the Q-factor of the oscillator [15]. Hence, the Q-factor is well suited for the quantitative analysis of the various factors that influence the tribological properties and, consequently, the operation of the nanotube-based NEMS.…”

Section: Introductionmentioning

confidence: 99%

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Dissipation and fluctuations in nanoelectromechanical systems based on carbon nanotubes

Lebedeva¹,

Knizhnik²,

Popov³

et al. 2009

Nanotechnology

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The tribological characteristics of nanotube-based nanoelectromechanical systems (NEMS) exemplified by a gigahertz oscillator are studied. Various factors that influence the tribological properties of nanotube-based NEMS are quantitatively analyzed with the use of molecular dynamics calculations of the quality factor (Q-factor) of the gigahertz oscillator. We demonstrate that commensurability of the nanotube walls can increase the dissipation rate, while the structure of the wall ends and the nanotube length do not influence the Q-factor. It is shown that the dissipation rate depends on the interwall distance and the way of fixation of the outer wall, and is significant in the case of a poor fixation for nanotubes with a large interwall distance. Defects are found to strongly decrease the Q-factor due to the excitation of low-frequency vibrational modes. No universal correlation between the static friction forces and the energy dissipation rate is established. We propose an explanation of the obtained results on the basis of the classical theory of vibrational-translational relaxation. Significant thermodynamics fluctuations are revealed in the gigahertz oscillator by molecular dynamics simulations and they are analyzed in the framework of the fluctuation-dissipation theorem. The possibility of designing NEMS with a desirable Q-factor and their applications are discussed on the basis of the above results.

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“…The detailed analysis shows that the critical amplitude F 0 min of the external control force is minimal in the case where lengths of inner and outer walls are equal. In this case the relationship for the gigahertz oscillator frequency (3) takes the form v5(p/2)(F W /2ms) 1/2 , t in 50 and equation (1) takes the form F 0 min 5 p 2 F W /32Q (9), where F W is the van der Waals force.…”

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confidence: 99%

A Nanoactuator Based on Carbon Nanotube: New Method of Control

Popov

Lozovik

Ershova

et al. 2007

Physics, Chemistry and Application of Nanostructures

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A new method to control the motion of nanotube-based nanoelectromechanical systems is proposed. Namely, the chemical adsorption of atoms and molecules on the open edges of the single-walled carbon nanotube leads to the appearance of electric dipole moment. In this case the nanotube can be actuated by a nonuniform electric field. Electric dipole moments of the carbon nanotubes with functionalized edges are calculated. Possibility of the method proposed is shown on example of the gigahertz oscillator. The parameters of the system and control force which allow obtaining the stationary operation with constant frequency are determined.

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Control of the motion of nanoelectromechanical systems based on carbon nanotubes

Cited by 8 publications

References 30 publications

Ultrafast nano-oscillators based on interlayer-bridged carbon nanoscrolls

Ultrafast nano-oscillators based on interlayer-bridged carbon nanoscrolls

Dissipation and fluctuations in nanoelectromechanical systems based on carbon nanotubes

A Nanoactuator Based on Carbon Nanotube: New Method of Control

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