The development of sensors for volatile nitro-containing compounds as models for explosives detection

Robert Blue, Zuzana Vobecka, Peter Skabara, Deepak Uttamchandani

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Sensors capable of detecting explosives or their degradation products are important devices needed to safeguard citizens and infrastructure. We report on the sensor application of novel customized polymer films that we have produced to have high affinity for chemical vapors containing the nitro (NO2) group, which is found in explosives such as TNT and DNT. We have used localized electrochemical growth of these polymers to realize miniature, high-selectivity capacitive sensors based on interdigitated electrodes (IDEs). These sensors have been tested for response to vapors of nitrobenzene and 2-nitrotoluene as model analytes for nitro vapors generated from explosive compounds. The sensors were demonstrated to be reversible and to have a very high selectivity to nitro-bearing compounds. In the ppm concentration region, our sensors exhibited a linear response up to three orders of magnitude higher to nitro groups than to other common volatile chemicals found in the atmosphere, which we believe is the highest selectivity to nitro compounds reported from a polymer-based chemicapacitor sensor
Original languageEnglish
Pages (from-to)534-542
Number of pages9
JournalSensors and Actuators B: Chemical
Volume176
Early online date27 Oct 2012
DOIs
Publication statusPublished - Jan 2013

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Keywords

  • development
  • sensors
  • volatile nitro-containing compounds
  • models
  • explosives detection
  • microsensor
  • electropolymerization
  • chemicapacitor
  • explosives sensor
  • polymer

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