Carbon nanotubes as piezoresistive microelectromechanical sensors: Theory and experiment
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Cullinan-2010-Carbon nanotubes as.pdf
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Author(s)
Culpepper, Martin Luther
Cullinan, Michael Arthur
Date Issued
September 2010
Journal
Physical Review B
Publisher
American Physical Society
Citation
Cullinan, Michael A., and Martin L. Culpepper. “Carbon nanotubes as piezoresistive microelectromechanical sensors: Theory and experiment.” Physical Review B 82.11 (2010): 115428. © 2010 The American Physical Society.
Version
Final published version
Abstract
Carbon-nanotube (CNT) -based strain sensors have the potential to overcome some of the limitations in small-scale force/displacement sensing technologies due to their small size and high sensitivity to strain. A better understanding of the dominant and limiting causes of high strain sensitivity is needed to enable the design and manufacture of high-performance sensor systems. This paper presents the theoretical framework that makes it possible to predict the strain sensitivity of a carbon nanotube based on it chiral indices (n,m). This framework is extended to capture the behavior of sensors composed of multiple CNTs in a parallel resistor network. This framework has been used to predict that a parallel resistor network of more than 100 randomly selected CNTs should have a gauge factor of approximately 78.5±0.4. This is within the experimental error of the measured gauge factor of 75±5 for such CNT resistor networks.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.82.115428
