Study on Piezoresistive of Doped Carbon Nanotube Films

W.L. Wang; K.J. Liao; C. Cai; C.G. Hu; Y. Ma; J.W. Lu

doi:10.4028/www.scientific.net/JMNM.23.309

Paper Titles

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Simultaneous Measurement of Epinephrine and Ascorbic Acid at the Carbon Nanotube Electrode
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Study on Piezoresistive of Doped Carbon Nanotube Films
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The Carbon Nanotubes with Different Chemical Treatments and Their Electrochemical Voltammetric Reponses
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A Study of the Effect of Polymer Matrix on the Ultrasonic Propagation in Silver Nanoparticles
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Ag Dispersed Conducting Polyaniline Nanocomposite as a Selective Sensor for Ammonia
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Design of Novel Nanocomposites through Interfacial Engineering
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Study on Piezoresistive of Doped Carbon Nanotube Films

Abstract:

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.