A Paper-Based Electrochromic Array for Visualized Electrochemical Sensing

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 electrodeposit...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2017-01, Vol.17 (2), p.276-276
Main Authors: Zhang, Fengling, Cai, Tianyi, Ma, Liang, Zhan, Liyuan, Liu, Hong
Format: Article
Language:English
Subjects:
Aluminum
Analytical chemistry
Arrays
battery
Catalytic oxidation
Chromatography
Color
Correlation analysis
Detection
Electrochemical cells
Electrochromism
Electrodes
Eyes
Glucose
Indium
Laboratories
Lactic acid
Pigments
POCT
Power supply
Reaction time
Sensors
Thin films
Tin oxides
Uric acid
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Summary: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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s17020276