Highly Sensitive NO2 Detection and DMP Sensing at Room Temperature using Flexible SWNT Thick Film Sensor

Forest Systems

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Title Highly Sensitive NO2 Detection and DMP Sensing at Room Temperature using Flexible SWNT Thick Film Sensor
 
Creator Kumar, Deepak; Solid State Physics Laboratory, Delhi and Department of Physics and Astrophysics, University of Delhi, Delhi
Chaturvedi, Poornendu; Solid State Physics Laboratory, Delhi
Chouksey, Abhilasha; Solid State Physics Laboratory, Delhi
Jha, Pika; Solid State Physics Laboratory, Delhi
Rawat, J.S.B.S.; Solid State Physics Laboratory, Delhi
Tandon, R.P.; Solid State Physics Laboratory, Delhi
Chaudhury, P.K.; Solid State Physics Laboratory, Delhi
 
Subject Sensor, thin film, suspension, response, recovery
 
Description   Low cost; easy to fabricate and flexible single wall carbon nanotubes thick film resistor (SWNT-TFR) for detailed study of NO2 detection is reported. SWNT-TFR was fabricated by vacuum filtration technique on flexible polycarbonate membrane. SWNT-TFR sensor shows selective response to NO2. The response increases from 1.47 per cent to 17.34 per cent with increasing the NO2 concentration from 0.2 ppm to 10 ppm, respectively. Different energy sources, IR, thermal and UV were explored for achieving fast recovery of the SWNT-TFR sensor. The results showed that the gas sensor gives immediate and fast recovery in the presence of UVC light. The calculated detection limit is less than 764 ppt for NO2. We are also presenting sensing of dimethyl methylphosphonate (DMMP) as a simulant of sarin. SWNT-TFR gives repeatable response of ~2.7 per cent for 500 ppm of DMMP. This work suggests the possibility to utilise SWNTs-TFR as NO2 sensors for air-quality monitoring. 
 
Publisher Defence Scientific Information & Documentation Centre
 
Contributor
 
Date 2016-06-28
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier http://publications.drdo.gov.in/ojs/index.php/dsj/article/view/10216
10.14429/dsj.66.10216
 
Source Defence Science Journal; Vol 66, No 4: Emerging Areas of Nano and Smart Materials; 413-420
0976464X
0011748X
 
Language eng
 
Relation http://publications.drdo.gov.in/ojs/index.php/dsj/article/view/10216/5654
 
Rights Copyright (c) 2016 Defence Science Journal
http://creativecommons.org/licenses/by-nc-nd/2.5/in
 

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