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Actuators 2016, 5(4), 23; doi:10.3390/act5040023

A Thermoacoustic Model for High Aspect Ratio Nanostructures

1
Small Systems Laboratory, Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA
2
ElectroOptics Research Institute and Nanotechnology Center, University of Louisville, Louisville, KY 40292, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Delbert Tesar
Received: 29 July 2016 / Revised: 6 September 2016 / Accepted: 12 September 2016 / Published: 22 September 2016
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Abstract

In this paper, we have developed a new thermoacoustic model for predicting the resonance frequency and quality factors of one-dimensional (1D) nanoresonators. Considering a nanoresonator as a fix-free Bernoulli-Euler cantilever, an analytical model has been developed to show the influence of material and geometrical properties of 1D nanoresonators on their mechanical response without any damping. Diameter and elastic modulus have a direct relationship and length has an inverse relationship on the strain energy and stress at the clamp end of the nanoresonator. A thermoacoustic multiphysics COMSOL model has been elaborated to simulate the frequency response of vibrating 1D nanoresonators in air. The results are an excellent match with experimental data from independently published literature reports, and the results of this model are consistent with the analytical model. Considering the air and thermal damping in the thermoacoustic model, the quality factor of a nanowire has been estimated and the results show that zinc oxide (ZnO) and silver-gallium (Ag2Ga) nanoresonators are potential candidates as nanoresonators, nanoactuators, and for scanning probe microscopy applications. View Full-Text
Keywords: nanomechanics; nanomaterials; nanoresonators; thermoacoustic modeling; loss factors; multiphysics finite element modeling nanomechanics; nanomaterials; nanoresonators; thermoacoustic modeling; loss factors; multiphysics finite element modeling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Loeian, M.S.; Cohn, R.W.; Panchapakesan, B. A Thermoacoustic Model for High Aspect Ratio Nanostructures. Actuators 2016, 5, 23.

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