Studies of nanotube-based resonant oscillators through multiscale modeling and simulation

Xiao, Shaoping; Hou, Wenyi

doi:10.1103/physrevb.75.125414

Cited by 16 publications

(9 citation statements)

References 16 publications

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“…Eq. (5) indicates that the loss angle is a function of the dynamic loading frequency . For the (10, 10) SWCNT being modeled, the loss angle is given as = tan −1 1 295 × 10 −1 /1 828 + 5 33 × 10 −3 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The loss angle associated with the loss tangent in the anelastic mechanical response of SWCNT is 7 (5) in which J = J 0 1 + 2 2 + J 1 / 1 + 2 2 , J = J 1 / 1 + 2 2 are the storage and loss compliance, respectively, and is the anelastic time constant. Eq.…”

Section: Resultsmentioning

confidence: 99%

“…We then applied Eq. (5) to arrive at the Q factors. For the four cases shown below, the predicted values were within the range of the experimental measurement in Refs.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Energy Dissipation and Intrinsic Loss in Single Walled Carbon Nanotubes due to Anelastic Relaxation

Zhou¹,

Qian²,

Yu³

2011

j nanosci nanotechnol

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Based on the molecular dynamics simulation and an elastic shell model, we investigated the intrinsic loss under dynamic excitations in single walled carbon nanotube (SWCNT) due to the anelastic relaxation mechanism. We quantified the anelastic property of SWCNTs, i.e., the creep compliances, and showed them to be on the order of 1 (TPa-1) and sensitive to both the radius of SWCNT and the loading rate. Furthermore, our study showed that the time scale for a SWCNT to fully achieve its equilibrium elastic property through anelastic relaxation is on the order of nanosecond. This leads to significant intrinsic loss and damping for SWCNT resonators operating at the Gigahertz frequency range. Both the loss angle and quality (Q) factor of SWCNT were found to be strongly dependent on the load frequency. A dissipation peak and thus a low Q factor were observed in the Gigahertz frequency range. On the other hand, high Q factor and low dissipation were achieved in the range of low (< 0.001 GHz) excitation frequency. The predicted influence of load frequency on the Q factor is in good agreement with the recent experimental observations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Energy Dissipation and Intrinsic Loss in Single Walled Carbon Nanotubes due to Anelastic Relaxation

Zhou¹,

Qian²,

Yu³

2011

j nanosci nanotechnol

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show abstract

“…Insets shown in Fig.7(a) and Fig.7(b) demonstrate the transient behavior between oscillatory-to-contact motion. Oscillatory motion, around 20Ghz, is sustained for low bias values below the threshold voltage (30.1V) [25]. We can see that the amplitude of the separation distance keeps constant, and it is equal to the initial extrusion length of the shell 1 (in red) and the shell 2 (in blue).…”

Section: B Rotation Of Inner Shells 1) Force Analysismentioning

confidence: 85%

Simulation of Rotary Motion Generated by Head-to-Head Carbon Nanotube Shuttles

Hamdi

Subramanian

Dong

et al. 2013

IEEE/ASME Trans. Mechatron.

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Abstract-A novel rotary nanomotor is described using two axially aligned, opposing chirality nanotube shuttles. Based on inter-shell screw-like motion of nanotubes, rotary motion is generated by electrostatically pulling the two cores together. Simulations using molecular dynamics show the generation of rotation from armchair nanotube pairs and their actuation properties. The simulation results, point towards the use of these motors as building blocks in nanoelectromechanical systems (NEMS) and nanorobotic systems for sensing, actuation, and computation applications.

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“…The unique hexagonal molecular structure provides a basic structural element for other allotropes, including graphite, charcoal, carbon nanotubes and fullerenes. Most of them, especially carbon nanotubes [1][2], have extraordinary material and electrical properties and have been used to design novel nanoscale composites and devices [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Studies of Cavity Effects on Graphene Sheets via Molecular Dynamics

Samanta¹,

Wang²,

Xiao³

2016

International Journal of Modern Studies in Mechanical Engineeri

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In this paper, the effects of cavities on graphene sheet failure were studied via molecular dynamics simulations. The graphene sheets with one centrally located cavity were simulated first. The Young's modulus and failure stress were calculated based on the simulated stress-strain curves. In addition, two or three cavities and their locations were also considered in this study. The Von Mises stress evolution indicated that the failure mechanism of graphene sheets with cavities were different from the one of a perfect graphene sheet.

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Studies of nanotube-based resonant oscillators through multiscale modeling and simulation

Cited by 16 publications

References 16 publications

Energy Dissipation and Intrinsic Loss in Single Walled Carbon Nanotubes due to Anelastic Relaxation

Energy Dissipation and Intrinsic Loss in Single Walled Carbon Nanotubes due to Anelastic Relaxation

Simulation of Rotary Motion Generated by Head-to-Head Carbon Nanotube Shuttles

Studies of Cavity Effects on Graphene Sheets via Molecular Dynamics

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