Visualization of electrochemical reactions on microelectrodes using light-addressable potentiometric sensor imaging
Fangming Chen1, Qiaoyu Yang1, MingRui Jiang1
1Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, China.
Analytica Chimica Acta
|August 23, 2022
Summary
This study introduces a novel device combining light-addressable potentiometric sensor (LAPS) imaging with microelectrodes for label-free visualization of electrochemical reactions. This platform enables real-time monitoring and analysis of dynamic electrochemical processes.
Area of Science:
- Electrochemistry
- Sensor Technology
- Analytical Chemistry
Background:
- Understanding electrochemical reactions requires effective visualization tools.
- Current methods may lack the sensitivity or real-time capabilities for dynamic processes.
Purpose of the Study:
- To develop a general electroanalysis platform for label-free sensing and imaging of electrochemical reactions.
- To combine Light-Addressable Potentiometric Sensor (LAPS) imaging with microelectrodes for enhanced visualization.
Main Methods:
- Assembled two microelectrodes on a LAPS chip.
- Utilized LAPS chip sensitivity to reaction products for qualitative and quantitative observation.
- Validated the platform with water electrolysis and potassium ferrocyanide oxidation.
Main Results:
- Demonstrated successful label-free visualization of electrochemical reactions around microelectrodes.
- Qualitatively and quantitatively observed reaction products using LAPS imaging.
- Validated the platform's efficacy in monitoring distinct electrochemical processes.
Conclusions:
- The developed device offers a simple yet powerful platform for visualizing and monitoring electrochemical reactions.
- This approach broadens the application of LAPS imaging as a general electroanalysis tool.
- The platform shows wide applicability across various scientific and industrial fields.
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