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Title: A strain gauge that uses carbon black and carbon nanotube doped silicone oil encapsulated in a PDMS microchannel
Authors: Cheng, CH 
Xiao, L
Cheung, YN
Chao, C
Yang, M 
Kwok, KL
Chong, PF
Leung, W
Keywords: Carbon black
Carbon nanotube
Silicone oil
Strain gauge
Issue Date: 2007
Source: 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings, 2007, 4601398, p. 1199-1202 How to cite?
Abstract: We present a piezoresistive strain gauge fabricated using electrically conductive silicone oil encapsulated in a close volume polydimethylsiloxane (PDMS) microchannel. The conductive silicone oil is made using carbon black and carbon nanotube to dope the silicone oil to become conductive. A characteristic of the electrical resistance versus the applied pulling force was measured. The non-linear behavior was due to the large deformation of the strain gauge, which makes the second order term of the increasing gauge length can not be ignored. An exponentially decrease of the resistance was found when applying a biasing voltage without exerting a force. It is caused by the reorganization of the carbon black particles in the silicone oil with applying electrical field. Temperature change also gave effect on the strain gauge with positive and negative temperature coefficients (PTC and NTC) with turning point at 55°C.
Description: 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Hong Kong, 2-5 August 2007
ISBN: 1424406080
DOI: 10.1109/NANO.2007.4601398
Appears in Collections:Conference Paper

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