Effect of Ultraviolet Activation on Sub-ppm NO2 Sensing Dynamics of Poly(3-hexylthiophene)-Bearing Graft Copolymers

Piotr Kaluzynski; Kinga Kepska; Monika Maciuch; Erwin Maciak; Agnieszka Stolarczyk; Marcin Procek; Tomasz Jarosz

doi:10.3390/s22249824

Effect of Ultraviolet Activation on Sub-ppm NO₂ Sensing Dynamics of Poly(3-hexylthiophene)-Bearing Graft Copolymers

Silesian University of Technology

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Nitrogen dioxide (NO₂) sensors utilising graft copolymers bearing poly(3-hexylthiophene) chains have been developed and investigated in terms of their operation parameters using different carrier gases (N₂ or air) and in either dark conditions or with ultraviolet (UV) irradiation. Interestingly, sensor performance improved upon transition from N₂ to air, with the inverse being true for most NO₂ sensors. UV irradiation both improved sensor dynamics and stabilised the sensor electrical baseline, allowing sensors based on SilPEG to fulfil the requirements of sensing solutions used in industry (below 10% baseline drift after sensors reach saturation) and making them promising candidates for further development and applications. Based on conducted multi-variate experiments, an initial mechanism underlying the interplay of exposure to oxygen (present in air) and UV irradiation was postulated.

Original language	English
Article number	9824
Journal	Sensors
Volume	22
Issue number	24
DOIs	https://doi.org/10.3390/s22249824
Publication status	Published - Dec 2022

Keywords

NOx sensor
copolymer
poly(3-hexylthiophene)
ppb
room temperature
ultraviolet activation

ASJC Scopus subject areas

Analytical Chemistry
Information Systems
Atomic and Molecular Physics, and Optics
Biochemistry
Instrumentation
Electrical and Electronic Engineering

Access to Document

10.3390/s22249824

Cite this

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title = "Effect of Ultraviolet Activation on Sub-ppm NO2 Sensing Dynamics of Poly(3-hexylthiophene)-Bearing Graft Copolymers",

abstract = "Nitrogen dioxide (NO2) sensors utilising graft copolymers bearing poly(3-hexylthiophene) chains have been developed and investigated in terms of their operation parameters using different carrier gases (N2 or air) and in either dark conditions or with ultraviolet (UV) irradiation. Interestingly, sensor performance improved upon transition from N2 to air, with the inverse being true for most NO2 sensors. UV irradiation both improved sensor dynamics and stabilised the sensor electrical baseline, allowing sensors based on SilPEG to fulfil the requirements of sensing solutions used in industry (below 10\% baseline drift after sensors reach saturation) and making them promising candidates for further development and applications. Based on conducted multi-variate experiments, an initial mechanism underlying the interplay of exposure to oxygen (present in air) and UV irradiation was postulated.",

keywords = "NOx sensor, copolymer, poly(3-hexylthiophene), ppb, room temperature, ultraviolet activation",

author = "Piotr Kaluzynski and Kinga Kepska and Monika Maciuch and Erwin Maciak and Agnieszka Stolarczyk and Marcin Procek and Tomasz Jarosz",

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AU - Kaluzynski, Piotr

AU - Kepska, Kinga

AU - Maciuch, Monika

AU - Maciak, Erwin

AU - Stolarczyk, Agnieszka

AU - Procek, Marcin

AU - Jarosz, Tomasz

PY - 2022/12

Y1 - 2022/12

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AB - Nitrogen dioxide (NO2) sensors utilising graft copolymers bearing poly(3-hexylthiophene) chains have been developed and investigated in terms of their operation parameters using different carrier gases (N2 or air) and in either dark conditions or with ultraviolet (UV) irradiation. Interestingly, sensor performance improved upon transition from N2 to air, with the inverse being true for most NO2 sensors. UV irradiation both improved sensor dynamics and stabilised the sensor electrical baseline, allowing sensors based on SilPEG to fulfil the requirements of sensing solutions used in industry (below 10% baseline drift after sensors reach saturation) and making them promising candidates for further development and applications. Based on conducted multi-variate experiments, an initial mechanism underlying the interplay of exposure to oxygen (present in air) and UV irradiation was postulated.

KW - NOx sensor

KW - copolymer

KW - poly(3-hexylthiophene)

KW - ppb

KW - room temperature

KW - ultraviolet activation

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