Zinc oxide nanowire electromechanical oscillator

Zhu, Rong; Wang, Dingqu; Xiang, Shaoqing; Zhou, Zhaoying; Ye, Xiongying

doi:10.1016/j.sna.2008.07.018

Cited by 13 publications

(7 citation statements)

References 13 publications

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“…Monocrystalline ionic or covalent nanowires are particularly attractive for resonant NEMS applications, because their relative structural perfection and high barriers to anelastic dislocation motion lead to high acoustic quality factors and correspondingly high resolution, stability, and signal-to-noise ratios. Monocrystalline materials that have been employed for nanowire resonators include GaN [3][4][5][6], ZnO [7], SiC [8][9][10][11][12][13][14], and Si [9,15].…”

Section: Introductionmentioning

confidence: 99%

Vibrational modes of GaN nanowires in the gigahertz range

et al. 2012

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Brillouin-light-scattering measurements and finite-element modeling of vibrational spectra in the range of 5-40 GHz are presented for an array of monocrystalline GaN nanowires with hexagonal cross sections. Analysis of the spectra is substantially complicated by the presence of a distribution of nanowire diameters. The measurements and calculations reveal a variety of modes with simple flexural, higher-order flexural, approximately 'plane-strain', approximately longitudinal and torsional displacement patterns that are similar to the corresponding modes of isotropic cylinders. The largest peaks in the spectra with acoustic angular wavenumbers in the range of 4 to ~15 μm(-1) were determined to arise from modes with relatively large transverse displacements, consistent with inelastic light scattering arising predominantly from surface ripple. These dominant modes have finite frequencies in the limit of zero wavenumber, corresponding to transverse standing waves. At higher wavenumbers, the spectra provide evidence for increased scattering through elasto-optic coupling, especially with respect to the emergence of a peak from a mode analogous to the longitudinal guided modes of thin films.

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Section: Introductionmentioning

confidence: 99%

Vibrational modes of GaN nanowires in the gigahertz range

et al. 2012

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“…In another study on carbon nanotube oscillators, Rasekh et al [4] have also numerically studied planar primary resonance behaviour using reduced order modelling. In an experimental investigation, Zhu et al [11] have examined zinc oxide nanowires as electromechanical oscillators for actuation and sensing purposes. Moreover, Solanki et al [12] have experimentally investigated nonlinear resonance behaviour of electrostatically actuated InAs nanowires.…”

Section: Introductionmentioning

confidence: 99%

Effects of DC voltage on initiation of whirling motion of an electrostatically actuated nanowire oscillator

Bhushan¹,

Inamdar²,

Pawaskar³

2013

Preprint

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Planar driven nanowire oscillators are susceptible to undergo whirling motion due to coupling between flexural planar and nonplanar modes of vibration. This investigation is concerned with planar to whirling motion transition in the oscillation of an electrostatically actuated nanowire, which is pre-deflected due to applied DC voltage. We have derived dynamical equations of motion using Euler-Bernoulli beam theory and Galerkin formulation as reduced order model of the governing coupled partial differential equations. The dynamical equations have been solved using second-order averaging method and the averaging solution has been validated by comparing with the numerical solution of the reduced order model. Further, planar to whirling motion transition has been investigated by studying qualitative changes in resonance curves with variation of electrostatic actuation. In this paper, we provide a simple analytical condition which takes into account the effects of DC voltage for prediction of initiation of whirling motion. Our main observation of the present investigation is that DC voltage can tune the initiation pattern of the whirling motion and change the qualitative nature of resonance curves.

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“…Recently, ZnO Nanowires have been attracting great deal of attention due to their amazing electronic, optical, and biocompatible properties for sensing, which can be employed in various fields. The abovementioned properties can be efficiently exploited for detecting a number of different physical phenomena such as typical field‐effect transistors in different configurations,1, 2 chemical and biological sensors,3 pH sensors (e.g., for intracellular sensors),4, 5 gas sensors,6, 7 mechanical sensors,8, 9 photo detectors,10, 11 photovoltaic applications or temperature sensors 12. Potential integration of such nanowire structures with microsystems and microelectronic readout circuits enable a coupling of nanoelectronics with microelectronics.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional ZnO-Nanowire-Based Sensor

et al. 2011

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A simple fabrication of ZnO‐nanowire‐based device and their implementation as a pH sensor, temperature sensor, and photo detector is reported. The presented multifunctional ZnO multiple‐nanowire sensor platform contains a Au finger structure, which is realized by conventional photolithography on a SiO2 substrate. The nanowires are grown using thermal chemical vapor deposition. In order to detect the physical signals, changes in electrical signals were measured (conductance and current). For temperature sensing, the current behavior from 90 to 380 K under vacuum conditions exhibit a tunneling behavior between spaced nanowires. For photo sensing, the current response between the “on” and “off” states of light was measured when exposed to different wavelengths ranging from UV to visible light. Finally, for pH sensing the conductance was measured between a pH of 5 and 8.5. The ZnO nanowires were protected from chemical attacks by a thin layer of C4F8‐plasma‐based coating.

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Zinc oxide nanowire electromechanical oscillator

Cited by 13 publications

References 13 publications

Vibrational modes of GaN nanowires in the gigahertz range

Vibrational modes of GaN nanowires in the gigahertz range

Effects of DC voltage on initiation of whirling motion of an electrostatically actuated nanowire oscillator

Multifunctional ZnO-Nanowire-Based Sensor

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