Smartphone-Based VOC Sensor Using Colorimetric Polydiacetylenes

Owing to a unique colorimetric (typically blue-to-red) feature upon environmental stimulation, polydiacetylenes (PDAs) have been actively employed in chemosensor systems. We developed a highly accurate and simple volatile organic compound (VOC) sensor system that can be operated using a conventional...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2018-02, Vol.10 (5), p.5014-5021
Main Authors: Park, Dong-Hoon, Heo, Jung-Moo, Jeong, Woomin, Yoo, Young Hyuk, Park, Bum Jun, Kim, Jong-Man
Format: Article
Language:English
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Summary:Owing to a unique colorimetric (typically blue-to-red) feature upon environmental stimulation, polydiacetylenes (PDAs) have been actively employed in chemosensor systems. We developed a highly accurate and simple volatile organic compound (VOC) sensor system that can be operated using a conventional smartphone. The procedure begins with forming an array of four different PDAs on conventional paper using inkjet printing of four corresponding diacetylenes followed by photopolymerization. A database of color changes (i.e., red and hue values) is then constructed on the basis of different solvatochromic responses of the 4 PDAs to 11 organic solvents. Exposure of the PDA array to an unknown solvent promotes color changes, which are imaged using a smartphone camera and analyzed using the app. A comparison of the color changes to the database promoted by the 11 solvents enables the smartphone app to identify the unknown solvent with 100% accuracy. Additionally, it was demonstrated that the PDA array sensor was sufficiently sensitive to accurately detect the 11 VOC gases.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.7b18121