کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9700962 | 1462132 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Controlled fabrication of carbon nanotube NO2 gas sensor using dielectrophoretic impedance measurement
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The authors have previously demonstrated an electrokinetic fabrication method of a carbon nanotube (CNT) gas sensor using dielectrophoresis. One advantage of the technique was that one could quantify the amount of trapped nanotubes on a real time basis by monitoring electrical impedance of the sensor (dielectrophoretic impedance measurement, DEPIM). In the present study, we extended the DEPIM technique to controllable assembly of the carbon nanotube gas sensor. This realized a production of CNT gas sensors with identical electrical properties such as initial conductance. The gas sensor response to ppm-level nitrogen dioxide (NO2) gas was investigated with various values of the initial conductance. It was found that relative conductance change of the CNT gas sensor after NO2 exposure increased almost proportionally with the initial conductance for a constant NO2 concentration. This enabled to define intrinsic sensitivity of CNT sensors by normalization. It was found that a single-wall CNT gas sensor had higher normalized sensitivity than a multi-wall CNT sensor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 108, Issues 1â2, 22 July 2005, Pages 398-403
Journal: Sensors and Actuators B: Chemical - Volume 108, Issues 1â2, 22 July 2005, Pages 398-403
نویسندگان
Junya Suehiro, Guangbin Zhou, Hiroshi Imakiire, Weidong Ding, Masanori Hara,