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A high sensitive strain sensor using a multi-walled carbon nanotube sheet

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4 Author(s)
Daewoong Jung ; Electr. Eng. Dept., Univ. of Texas at Dallas, Richardson, TX, USA ; Lee, K.H. ; Overzet, Lawrence J. ; Lee, G.S.

A multi-walled carbon nanotube (MWCNT) sheet-based strain sensor is presented in this paper, which possesses a novel fabrication technique that employs a simpler process than that of dispersing CNTs into a liquid or polymer. The sheets were spun from a MWCNT forest grown on a silicon substrate. The electrical resistance of the MWCNT sheets increased linearly with an increased tensile strain. The sheet did not require any chemical grafting or charging in order to work as a sensor, making it an ideal strain sensor. The proposed sensor exhibited excellent piezoresistive behavior under repetitive strain and relaxation, as well as a relatively high sensitivity compared to other methods, highlighting its potential application to high sensitivity pressure and force sensors.

Published in:

Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on

Date of Conference:

20-23 Aug. 2012

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