Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde
Formaldehyde is a suspect carcinogen, an allergen, and a contributor to the sick-building syndrome (SBS) and the Occupational Health and Safety Administration (OSHA) has set a permissible exposure limit (PEL) of 750 ppb. Thus, there is a need to sensitively and selectively monitor formaldehyde in re...
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th-mahidol.338232018-11-09T10:14:07Z Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde Sira Srinives Tapan Sarkar Ashok Mulchandani University of California, Riverside Mahidol University Engineering Materials Science Physics and Astronomy Formaldehyde is a suspect carcinogen, an allergen, and a contributor to the sick-building syndrome (SBS) and the Occupational Health and Safety Administration (OSHA) has set a permissible exposure limit (PEL) of 750 ppb. Thus, there is a need to sensitively and selectively monitor formaldehyde in real-time. Herein, we report a primary amine-functionalized polyaniline (PANI) nanothin film chemiresistor sensor utilizing nucleophilic addition of amines of the sensor to the carbonyl group of formaldehyde. The reaction between the amines and formaldehyde produced water and Schiff base that changed the resistance of the PANI film as a function of formaldehyde concentration. The sensor response was investigated as a function of the functionalizing primary amine nucleophilicity and humidity/temperature of the background medium. The lysine-functionalized polyaniline nanothin film sensor exhibited the best sensor performance with a lower limit of detection of 400 ppb, which is nearly half of the PEL, and very good selectivity against acetaldehyde, acetone and formic acid. © 2013 Elsevier B.V. 2018-11-09T02:13:50Z 2018-11-09T02:13:50Z 2014-04-01 Article Sensors and Actuators, B: Chemical. Vol.194, (2014), 255-259 10.1016/j.snb.2013.12.079 09254005 2-s2.0-84892731062 https://repository.li.mahidol.ac.th/handle/123456789/33823 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84892731062&origin=inward |
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Engineering Materials Science Physics and Astronomy Sira Srinives Tapan Sarkar Ashok Mulchandani Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
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Formaldehyde is a suspect carcinogen, an allergen, and a contributor to the sick-building syndrome (SBS) and the Occupational Health and Safety Administration (OSHA) has set a permissible exposure limit (PEL) of 750 ppb. Thus, there is a need to sensitively and selectively monitor formaldehyde in real-time. Herein, we report a primary amine-functionalized polyaniline (PANI) nanothin film chemiresistor sensor utilizing nucleophilic addition of amines of the sensor to the carbonyl group of formaldehyde. The reaction between the amines and formaldehyde produced water and Schiff base that changed the resistance of the PANI film as a function of formaldehyde concentration. The sensor response was investigated as a function of the functionalizing primary amine nucleophilicity and humidity/temperature of the background medium. The lysine-functionalized polyaniline nanothin film sensor exhibited the best sensor performance with a lower limit of detection of 400 ppb, which is nearly half of the PEL, and very good selectivity against acetaldehyde, acetone and formic acid. © 2013 Elsevier B.V. |
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University of California, Riverside |
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University of California, Riverside Sira Srinives Tapan Sarkar Ashok Mulchandani |
format |
Article |
author |
Sira Srinives Tapan Sarkar Ashok Mulchandani |
author_sort |
Sira Srinives |
title |
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
title_short |
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
title_full |
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
title_fullStr |
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
title_full_unstemmed |
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
title_sort |
primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/33823 |
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1763488315190804480 |