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Microfluidic impedance cytometry for single-cell sensing: Review on electrode configurations
Shu Zhu1, Xiaozhe Zhang1, Zheng Zhou1
1School of Mechanical Engineering, And Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing, 211189, China.
Talanta
|July 3, 2021
Summary
Microfluidic impedance cytometry (MIC) offers a label-free, noninvasive alternative to flow cytometry for cell analysis. This review details various MIC electrode configurations, guiding researchers in optimizing designs for improved cell detection and throughput.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Analytical Chemistry
Background:
- Single-cell analysis is crucial for disease diagnosis, drug screening, and monitoring cell differentiation.
- Microfluidic impedance cytometry (MIC) provides a label-free, noninvasive method for cell analysis, contrasting with fluorescent-based flow cytometry.
- MIC devices leverage impedance signal changes to extract cellular information like size, shape, and dielectric properties.
Purpose of the Study:
- To review the theoretical background of impedance techniques for single-cell analysis.
- To discuss various electrode configurations (2D, 3D, liquid) in MIC devices.
- To provide a guide for researchers on advancements in MIC electrode designs.
Main Methods:
- Review of theoretical principles of impedance-based cell analysis.
- Categorization and detailed discussion of 2D, 3D, and liquid electrode configurations.
- Analysis of sensing mechanisms, fabrication, advantages, disadvantages, and applications of each configuration.
Main Results:
- Electrode configuration significantly impacts MIC device accuracy, sensitivity, and throughput.
- Various electrode designs have been developed to enhance MIC performance.
- Each electrode configuration presents unique benefits and drawbacks for specific applications.
Conclusions:
- MIC offers a promising label-free approach for advanced cell analysis.
- Understanding electrode configurations is key to optimizing MIC device performance.
- Further research into electrode design will drive innovation in single-cell analysis.
