Publication: Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde
Issued Date
2014-04-01
Resource Type
ISSN
09254005
Other identifier(s)
2-s2.0-84892731062
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sensors and Actuators, B: Chemical. Vol.194, (2014), 255-259
Suggested Citation
Sira Srinives, Tapan Sarkar, Ashok Mulchandani Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde. Sensors and Actuators, B: Chemical. Vol.194, (2014), 255-259. doi:10.1016/j.snb.2013.12.079 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33823
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Primary amine-functionalized polyaniline nanothin film sensor for detecting formaldehyde
Author(s)
Other Contributor(s)
Abstract
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.