Modiried carbon nanotube gas sensors

作者：Wen Xiaoyan^*

来源：Progress in Chemistry, 2008, 20(2-3): 260-264.

• carbon nanotubes
• gas sensors
• modification
• doping

Due to the high sensitivity, fast response time, small size and the capability of working at room temperature, carbon nanotubes ( CNTs) have been demonstrated to be a kind of promising nanoscale gas sensors. However, the range of molecules that can be detected by intrinsic CNTs gas sensors is limited to a few gas molecules including NH3, O-2,, NO2 and SO2, and the detection sensitivity and selectivity are unsatisfied. Researches have revealed that modification of CNTs can overcome these shortages. The existing modifying methods mainly include organic trim of CNTs external surface, doping inorganic impurity atoms and radial mechanical deformation. The recent progress in the study of modified carbon nanotubes gas sensors are reviewed in this paper, in which analysis about the merits and demerits of the mentioned modifying methods in expanding the detection range, improving the detection sensitivity and selectivity of CNTs gas sensors are involved.

• 出版日期2008-3
• 单位武汉理工大学