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A Paper-Based Electrochromic Array for Visualized Electrochemical Sensing.

Authors :
Fengling Zhang
Tianyi Cai
Liang Ma
Liyuan Zhan
Hong Liu
Source :
Sensors (14248220). Feb2017, Vol. 17 Issue 2, p276. 10p.
Publication Year :
2017

Abstract

We report a battery-powered, paper-based electrochromic array for visualized electrochemical sensing. The paper-based sensing system consists of six parallel electrochemical cells, which are powered by an aluminum-air battery. Each single electrochemical cell uses a Prussian Blue spot electrodeposited on an indium-doped tin oxide thin film as the electrochromic indicator. Each electrochemical cell is preloaded with increasing amounts of analyte. The sample activates the battery for the sensing. Both the preloaded analyte and the analyte in the sample initiate the color change of Prussian Blue to Prussian White. With a reaction time of 60 s, the number of electrochemical cells with complete color changes is correlated to the concentration of analyte in the sample. As a proof-of-concept analyte, lactic acid was detected semi-quantitatively using the naked eye. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14248220
Volume :
17
Issue :
2
Database :
Academic Search Index
Journal :
Sensors (14248220)
Publication Type :
Academic Journal
Accession number :
121459432
Full Text :
https://doi.org/10.3390/s17020276