Prasad Dharap et al 2004 Nanotechnology 15 379 doi:10.1088/0957-4484/15/3/026
Prasad Dharap1, Zhiling Li1, Satish Nagarajaiah1 and E V Barrera2
Show affiliationsCarbon nanotubes change their electronic properties when subjected to strains. In this study, the strain sensing characteristic of carbon nanotubes is used to develop a carbon nanotube film sensor that can be used for strain sensing on the macro scale. The carbon nanotube film is isotropic due to randomly oriented bundles of single-wall carbon nanotubes (SWCNTs). Using experimental results it is shown that there is a nearly linear change in voltage across the film when it is subjected to tensile and compressive stresses. The change in voltage is measured by a movable four-point probe in contact with the film. Multidirectional and multiple location strains can be measured by the isotropic carbon nanotube film.
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Issue 3 (March 2004)
Received 15 October 2003, in final form 5 December 2003
Published 13 January 2004
Prasad Dharap et al 2004 Nanotechnology 15 379
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