Novel polymer materials for low-cost nitro vapor detection sensors

Abstract

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A Study on the Impact of Poly(3-hexylthiophene) Chain Length and Other Applied Side-Chains on the NO2 Sensing Properties of Conducting Graft Copolymers

“…Thus, NO 2 monitoring is important in the automotive and the energetic industries [ 3 , 4 ]. The nitro compounds are also components of vapors of explosive materials, such as trinitrotoluene, Research Department Explosive, and nitroglycerine [ 5 , 6 , 7 ].…”

Chemicapacitors as a versatile platform for miniature gas and vapor sensors

“…The initial sensors demonstrated a rapid, linear and reversible response to around 20 ppm (limited by the available test vapors). For the detection of explosives sub-ppm detectable concentrations are desirable, and therefore the authors altered the synthesis chemistry of the monomer to create a polymer incorporating spiro compounds to greatly increase the porosity of the polymers [73]. The resultant chemicapacitors exhibited a selective and reversible detection of nitrotoluene and nitrobenzene vapors to a concentration of around 200 ppb in room air (see Figure 12).…”