Study on Piezoresistive of Doped Carbon Nanotube Films


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The piezoresistive effect in iodine-doped carbon nanotube films was investigated by a three-point bending test. Carbon nanotubes were synthesized by hot filament chemical vapor deposition. The experimental results showed that the gauge factor for I-doped and undoped carbon nanotube films under 500 microstrain was about 350 and 65 respectively at room temperature, exceeding that of polycrystalline silicon (30) at 35°C. The origin of the piezoresistivity in the films may be ascribed to a strain-induced change in the band gap for the doped tubes and the intertube contact resistance and defects for the undoped tubes.


Edited by:

M. Gupta and Christina Y.H. Lim




W.L. Wang et al., "Study on Piezoresistive of Doped Carbon Nanotube Films", Journal of Metastable and Nanocrystalline Materials, Vol. 23, pp. 309-312, 2005

Online since:

January 2005




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