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Open AccessArticle

Study of Light-Activated Regioregular Poly(3-Hexyltiophene) Photoconductive Polymer Sensing Properties in Nerve Agent Simulant (DMMP) Detection

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Institute of Physics CSE, Silesian University of Technology, 44-100 Gliwice, Poland
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Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, 44-100 Gliwice, Poland
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Institute of Electronics, Silesian University of Technology, 44-100 Gliwice, Poland
*
Authors to whom correspondence should be addressed.
This paper is an extended version of “Study of Poly(3-hexyltiophene) Polymer Sensing Properties in Nerve Agent Simulant (DMMP) Detection”, written by Paulina Powroźnik, Agnieszka Stolarczyk, Jaroslaw Wrotniak, Wiesław Jakubik, published in Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Sensors 2020, 20(2), 491; https://doi.org/10.3390/s20020491
Received: 9 December 2019 / Revised: 9 January 2020 / Accepted: 14 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Polymeric Chemosensors)
In the present work, we report the use of regioregular poly(3-hexyltiophene) polymer (RR-P3HT) as a potential light-activated material for sensing the chemical nerve agent simulant dimethyl methylphosphonate (DMMP). The electrical response of thick films of RR-P3HT, deposited by spray-coating method onto a porous laminate substrate at room temperature, to DMMP vapours was investigated. The studied material was activated by light-emitting diodes that emitted light of different wavelengths. The sensing properties of RR-P3HT are considerably enhanced upon exposure to blue and yellow light. However, excitation by the low wavelength light (blue) caused degeneration of the material, resulting in lowered stability. In the case of the yellow light, degeneration was much slower and the limit of detection was 0.4 ppm. The studied material exhibited high selectivity, as it did not respond to 6 ppm of acetone and methanol vapours.
Keywords: regioregular poly(3-hexyltiophene); nerve agents sensor; sarin detection; DMMP; light activation; room temperature regioregular poly(3-hexyltiophene); nerve agents sensor; sarin detection; DMMP; light activation; room temperature
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Powroznik, P.; Jakubik, W.; Stolarczyk, A.; Kazmierczak-Balata, A.; Wrotniak, J.; Jarosz, T. Study of Light-Activated Regioregular Poly(3-Hexyltiophene) Photoconductive Polymer Sensing Properties in Nerve Agent Simulant (DMMP) Detection. Sensors 2020, 20, 491.

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