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Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
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Self-Powered Organic Photoelectrochemical Transistor Detection
Chunwang Chai1, Yang Zhao1, Hanxiao He1
1Hebei Key Laboratory of Nano-Biotechnology, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China.
Analytical Chemistry
|January 12, 2026
Summary
A novel self-powered organic photoelectrochemical transistor (OPECT) enables sensitive enrofloxacin detection without external voltage. This OPECT platform offers a promising tool for environmental monitoring and bioanalysis.
Area of Science:
- Materials Science
- Electrochemistry
- Biosensing
Background:
- Organic photoelectrochemical transistors (OPECTs) show potential for bioanalysis but require dual-voltage operation.
- Developing self-powered devices is crucial for simplifying OPECT applications.
Purpose of the Study:
- To construct a self-powered OPECT for detecting enrofloxacin (ENR).
- To overcome the limitations of dual-voltage requirements in OPECTs for practical bioanalysis.
Main Methods:
- Integration of a solar cell into an OPECT device.
- Utilizing a Bi-MOF@CdS@Au/DNA structure for ENR recognition.
- Monitoring changes in channel current (IDS) upon ENR binding.
Main Results:
- The self-powered OPECT successfully detected ENR through aptamer-induced signal changes.
- Achieved a wide linear detection range from 100 pg/mL to 100 μg/mL (R2 = 0.993).
- Obtained a low detection limit of 0.568 pg/mL (S/N = 3).
Conclusions:
- The developed self-powered OPECT offers a sensitive and efficient platform for ENR detection.
- This approach eliminates the need for external power sources, enhancing usability.
- The OPECT shows significant promise for environmental monitoring applications.
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