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A Paper-Based Electrochromic Array for Visualized Electrochemical Sensing.

Fengling Zhang1, Tianyi Cai2, Liang Ma3

  • 1State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China. 220143702@seu.edu.cn.

Sensors (Basel, Switzerland)
|February 2, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a battery-powered, paper-based sensor for electrochemical sensing. The device visualizes analyte concentration through color changes, demonstrated by detecting lactic acid.

Keywords:
POCTbatteryelectrochromismpaper

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Electrochemical sensing offers sensitive detection but often requires complex instrumentation.
  • Paper-based devices provide a low-cost, portable platform for chemical analysis.
  • Visualized detection methods enhance accessibility and ease of use.

Purpose of the Study:

  • To develop a battery-powered, paper-based electrochromic array for visualized electrochemical sensing.
  • To demonstrate the semi-quantitative detection of analytes using a colorimetric readout.
  • To create a simple and accessible sensing system for potential point-of-care applications.

Main Methods:

  • Fabrication of a paper-based sensing system with six parallel electrochemical cells.
  • Integration of an aluminum-air battery as the power source.
  • Utilizing Prussian Blue as an electrochromic indicator on indium-doped tin oxide (ITO) thin films.
  • Correlation of the number of color-changed cells to analyte concentration.

Main Results:

  • Successful demonstration of a battery-powered, paper-based electrochromic array.
  • Visualized color change from Prussian Blue to Prussian White indicating analyte presence.
  • Semi-quantitative detection of lactic acid within 60 seconds.
  • The number of fully color-changed cells directly correlated with lactic acid concentration.

Conclusions:

  • The developed paper-based electrochromic array provides a simple, visualized method for electrochemical sensing.
  • The system's battery power and paper substrate offer portability and low cost.
  • This technology shows promise for accessible semi-quantitative analysis of analytes like lactic acid.