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The Scientific World Journal
Volume 2014 (2014), Article ID 406154, 9 pages
http://dx.doi.org/10.1155/2014/406154
Research Article

Strain Sensor of Carbon Nanotubes in Microscale: From Model to Metrology

Tianjin Key Laboratory of Modern Engineering Mechanics, Department of Mechanics, Tianjin University, Tianjin 300072, China

Received 30 October 2013; Accepted 25 December 2013; Published 10 February 2014

Academic Editors: Y. Fu and G. Pedrini

Copyright © 2014 Wei Qiu et al. 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.

Abstract

A strain sensor composed of carbon nanotubes with Raman spectroscopy can achieve measurement of the three in-plane strain components in microscale. Based on previous work on the mathematic model of carbon nanotube strain sensors, this paper presents a detailed study on the optimization, diversification, and standardization of a CNT strain sensor from the viewpoint of metrology. A new miniaccessory for polarization control is designed, and two different preparing methods for CNT films as sensing media are introduced to provide diversified choices for applications. Then, the standard procedure of creating CNT strain sensors is proposed. Application experiments confirmed the effectiveness of the above improvement, which is helpful in developing this method for convenient metrology.