Acceleration sensing based on piezoresistive effect of carbon nanotube films  

作　　者：韦逢艳 

机构地区：[1]College of Mathematics and Physics, Chongqing University,Chongqing, 400030, P. R. China

出　　处：《Journal of Chongqing University》2006年第3期157-160,共4页重庆大学学报（英文版）

基　　金：Funded by the National Natural Science Foundation of China (No. 60376032 and No. 90406024) and the Key Teacher Foundation of Chongqing University.

摘　　要：Based on piezoresistive effect, the acceleration sensitivity of multi-walled canbon nanotube (MWNT) films was investigated. A three-point bending technique was presented to measure the piezoresistivity, which used a bending stress applied to the samples while making MWNT films wheeling with a rotational machine. The experimental results showed that the fractional increase in resistance increases linearly versus the increase of centripetal acceleration, and there is a linear relationship between the acceleration and the strain. These shed light on using carbon nanotube films as acceleration sensors for many potential applications.Based on piezoresistive effect, the acceleration sensitivity of multi-walled canbon nanotube （MWNT） films was investigated. A three-point bending technique was presented to measure the piezoresistivity, which used a bending stress applied to the samples while making MWNT films wheeling with a rotational machine. The experimental results showed that the fractional increase in resistance increases linearly versus the increase of centripetal acceleration, and there is a linear relationship between the acceleration and the strain. These shed light on using carbon nanotube films as acceleration sensors for many potential applications.

关 键 词：carbon nanotubes centripetal acceleration STRAIN SENSOR 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]