Gas Sensors Based on Single-Walled Carbon Nanotube Field-Effect Transistor

被引：0
|
作者：
Wei, Liangming [1 ]
Chen, Haiyan [1 ]
Wang, Jian [1 ]
Yuang, Weien [2 ]
Zhao, Jiang [1 ]
Xu, Dong [1 ]
Zhang, Yafei [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Micro Nano Sci & Technol, Key Lab Thin Film & Microfabricat, Minist Educ, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Pharm, Shanghai 200240, Peoples R China
来源：
SENSORS AND MATERIALS | 2014年 / 26卷 / 01期
基金：
中国国家自然科学基金;
关键词：
carbon nanotubes; field-effect transistors; gas sensor; self-assembly; dimethyl methylphosphonate; ADSORPTION; VAPORS; ARRAYS; NH3;
D O I：
暂无
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Single-walled carbon nanotube (SWCNT) gas sensors with field-effect-transistor (PET) structure have received much attention owing to their excellent properties such as high sensitivity, small size, room-temperature operation, and self-desorption by gate bias. In this study, SWCNT-FET was constructed via the self-assembly of a uniform SWCNT film on a Si/SiO2 substrate, which exhibited a large current on/off ratio of up to 10(5). This SWCNT-based FET could be used as gas sensors. Upon exposure to dimethyl methylphosphonate (DMMP, simulant of nerve agent sarin), the current of the device decreased and the threshold voltage shifted toward the negative gate voltage direction. This sensor could easily detect DMMP down to 1 ppm concentration. This sensor could also be 100% recovered when a gate voltage of 15 V is applied to the device.
引用
收藏
页码：9 / 17
页数：9
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