Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing
© 2017 by the authors. Polyaniline (PANI) nanostructures have been widely studied for their sensitivity to atmospheric pollutants at ambient conditions. We recently showed an effective way to electropolymerize a PANI nanothin film on prefabricated microelectrodes, and demonstrated its remarkable sen...
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th-mahidol.422472019-03-14T15:03:17Z Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing Sira Srinives Tapan Sarkar Raul Hernandez Ashok Mulchandani University of California, Riverside Mahidol University Guru Gobind Singh Indraprastha University Chemistry © 2017 by the authors. Polyaniline (PANI) nanostructures have been widely studied for their sensitivity to atmospheric pollutants at ambient conditions. We recently showed an effective way to electropolymerize a PANI nanothin film on prefabricated microelectrodes, and demonstrated its remarkable sensing performance to be comparable to that of a one-dimensional nanostructure, such as PANI nanowires. In this work, we report further progress in the application of the PANI nanothin film chemiresistive sensor for the detection of ozone (O3) by modifying the film with potassium iodide (KI). The KI-PANI sensor exhibited an excellent sensitivity to O3(8-180 ppb O3concentration rage) with a limit of detection of 230 ppt O3, and exquisite selectivity against active chemicals such as nitrogen dioxide (NO2) and sulfur dioxide (SO2). The sensing mechanism of the sensor relied on iodometric chemistry of KI and O3, producing triiodide (I-3) that partially doped and increased electrical conductivity of the PANI film. The sensitivity and selectivity of the KI-functionalized PANI film demonstrates the potential use for KI-PANI-based (O3) sensing devices in environmental monitoring and occupational safety. 2018-12-21T07:16:13Z 2019-03-14T08:03:17Z 2018-12-21T07:16:13Z 2019-03-14T08:03:17Z 2017-01-01 Article Polymers. Vol.9, No.3 (2017) 10.3390/polym9030080 20734360 2-s2.0-85014910819 https://repository.li.mahidol.ac.th/handle/123456789/42247 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014910819&origin=inward |
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Chemistry Sira Srinives Tapan Sarkar Raul Hernandez Ashok Mulchandani Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
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© 2017 by the authors. Polyaniline (PANI) nanostructures have been widely studied for their sensitivity to atmospheric pollutants at ambient conditions. We recently showed an effective way to electropolymerize a PANI nanothin film on prefabricated microelectrodes, and demonstrated its remarkable sensing performance to be comparable to that of a one-dimensional nanostructure, such as PANI nanowires. In this work, we report further progress in the application of the PANI nanothin film chemiresistive sensor for the detection of ozone (O3) by modifying the film with potassium iodide (KI). The KI-PANI sensor exhibited an excellent sensitivity to O3(8-180 ppb O3concentration rage) with a limit of detection of 230 ppt O3, and exquisite selectivity against active chemicals such as nitrogen dioxide (NO2) and sulfur dioxide (SO2). The sensing mechanism of the sensor relied on iodometric chemistry of KI and O3, producing triiodide (I-3) that partially doped and increased electrical conductivity of the PANI film. The sensitivity and selectivity of the KI-functionalized PANI film demonstrates the potential use for KI-PANI-based (O3) sensing devices in environmental monitoring and occupational safety. |
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University of California, Riverside |
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University of California, Riverside Sira Srinives Tapan Sarkar Raul Hernandez Ashok Mulchandani |
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Article |
author |
Sira Srinives Tapan Sarkar Raul Hernandez Ashok Mulchandani |
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Sira Srinives |
title |
Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
title_short |
Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
title_full |
Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
title_fullStr |
Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
title_full_unstemmed |
Potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
title_sort |
potassium iodide-functionalized polyaniline nanothin film chemiresistor for ultrasensitive ozone gas sensing |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/42247 |
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1763491932276785152 |