Piezoresistive Effect of Doped Carbon Nanotube/Cellulose Films
WANG Wan-Lu1,2 , LIAO Ke-Jun1 , LI Yong1 , WANG Yong-Tian1
1 Department of Applied Physics, Chongqing University, Chongqing 400044
2 Key Laboratory of Education Ministry for Photoelectron Technology and System, Chongqing University, Chongqing 400044
Piezoresistive Effect of Doped Carbon Nanotube/Cellulose Films
WANG Wan-Lu1,2 ;LIAO Ke-Jun1 ;LI Yong1 ;WANG Yong-Tian1
1 Department of Applied Physics, Chongqing University, Chongqing 400044
2 Key Laboratory of Education Ministry for Photoelectron Technology and System, Chongqing University, Chongqing 400044
关键词 ：
61.46.+w ,
81.07.-b
Abstract ： The strain-induced resistance changes in iodine-doped and undoped carbon nanotube films were investigated by a three-point bending test. Carbon nanotubes were fabricated by hot filament chemical vapor deposition. The experimental results showed that there has a striking piezoresistive effect in carbon nanotube films. The gauge factor for I-doped and undoped carbon nanotube films under 500 microstrain was about 125 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 to the intertube contact resistance for the undoped tubes.
Key words ：
61.46.+w
81.07.-b
出版日期: 2003-09-01
:
61.46.+w
81.07.-b
(Nanoscale materials and structures: fabrication and characterization)
引用本文:
WANG Wan-Lu;LIAO Ke-Jun;LI Yong;WANG Yong-Tian. Piezoresistive Effect of Doped Carbon Nanotube/Cellulose Films[J]. 中国物理快报, 2003, 20(9): 1544-1547.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2003/V20/I9/1544
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