Smartphone-Based VOC Sensor Using Colorimetric Polydiacetylenes
- Authors
- Park, Dong-Hoon; Heo, Jung-Moo; Jeong, Woomin; Yoo, Young Hyuk; Park, Bum Jun; Kim, Jong-Man
- Issue Date
- Feb-2018
- Publisher
- AMER CHEMICAL SOC
- Keywords
- polydiacetylene; conjugated polymer; VOC sensor; solvatochromism; smartphone-based detection
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.10, no.5, pp.5014 - 5021
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 10
- Number
- 5
- Start Page
- 5014
- End Page
- 5021
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/32996
- DOI
- 10.1021/acsami.7b18121
- ISSN
- 1944-8244
- Abstract
- 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.
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