Thin film sensor materials for detection of Nitro-Aromatic explosives

International Conference on Functional Materials and Chemical Engineering 2017

材料科学;化学工业

Ramdasi, Dipali^1 ; Mudhalwadkar, Rohini^2

Department of Instrumentation and Control, Cummins College of Engineering for Women, Karvenagar, Pune

411052, India^1

Department of Instrumentation and Control, College of Engineering Pune, Shivajinagar, Pune

411005, India^2

关键词: Cross sensitivity;    Detection of explosives;    Explosive properties;    Nitro aromatic explosives;    Nitroaromatic compound;    Response and recovery time;    Sensor performance;    Terrorist activities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/323/1/012003/pdf
DOI  :  10.1088/1757-899X/323/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Many countries have experienced terrorist activities and innocent people have suffered. Timely detection of explosives can avoid this situation. This paper targets the detection of Nitrobenzene and Nitrotoluene, which are nitroaromatic compounds possessing explosive properties. As direct sensors for detecting these compounds are not available, Polyaniline based thin film sensors doped with palladium are developed using the spin coating technique. The response of the developed sensors is observed for varying concentrations of explosives. It is observed that zinc oxide based sensor is more sensitive to Nitrotoluene exhibiting a relative change in resistance of 0.78. The tungsten oxide sensor is more sensitive to Nitrobenzene with a relative change in resistance of 0.48. The sensor performance is assessed by measuring the response and recovery time. The cross sensitivity of the sensors is evaluated for ethanol, acetone and methanol which was observed as very low.