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Cellular Signal Detection by Hydrogenated Amorphous Silicon Photosensitive Chip with Electroexcitation
Fengyan Hou1,2,3, Jianjun Dong1,2,3, Xia Wang1,2,3
1International Research Centre for Nano Handling and Manufacturing of China, Changchun University of Science and Technology, Changchun 130022, China.
Sensors (Basel, Switzerland)
|September 13, 2025
Summary
This study enhances cellular electrical detection using a hydrogenated amorphous silicon (a-Si:H) chip. Applying specific electrical signals significantly improves signal quality and reduces noise for better bioelectrical recordings.
Area of Science:
- Biophysics
- Materials Science
- Electrical Engineering
Background:
- Cellular electrical detection relies on photosensitive chips.
- Optimizing signal quality is crucial for accurate electrophysiological studies.
Purpose of the Study:
- To investigate the impact of electrical excitation on hydrogenated amorphous silicon (a-Si:H) photosensitive chips.
- To enhance the detection performance of a-Si:H chips for cellular bioelectrical signals.
Main Methods:
- Characterized a-Si:H chip using electrochemical impedance spectroscopy (EIS) and volt-ampere analysis.
- Developed and verified equivalent circuit models (ECMs) through analog experiments.
- Applied alternating current (AC) and direct current (DC) signals to the chip during cardiomyocyte recording.
Main Results:
- High-frequency small AC signals reduced system background noise by 85.1%.
- DC bias increased detection signal amplitude by 142.7%.
- Electrical excitation significantly improved the detection of weak bioelectrical signals.
Conclusions:
- Electrical excitation is a key factor in optimizing a-Si:H photosensitive chip performance.
- The study demonstrates enhanced applicability of a-Si:H chips in cellular electrophysiology.
- Optimized electrical parameters lead to superior bioelectrical signal detection.
