数字农科院2.0

Photothermal-Thermoelectric Cooperative Effects Mediating Zero-Bias Microscale Current Amplification in Organic Photoelectrochemical Transistors

文献类型： 外文期刊

作者： Chi, Jingtian;Ju, Peng;Cai, Yueyuan;Jiang, Tiantong;Wen, Siyu;Zhang, Peng;Qiu, Meng

作者机构：

关键词： OPECT;PEC;photothermal-thermoelectric;MXene;okadaic acid

期刊名称： ACS SENSORS

ISSN： 2379-3694

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Light-driven organic photoelectrochemical transistors (OPECTs) in bioanalytical contexts show significant potential, yet they often demand a considerable current for photoelectrode-driven redox processes. Here, a robust near-infrared excited photothermal-thermoelectric-driven OPECT sensing platform has been meticulously crafted to facilitate minute current amplification with precision. To attain this objective, the initial step involves harnessing energy via photothermal-thermoelectric-based electrodes. Upon exposure to near-infrared radiation, the photothermal active matrix of MXene and the conformative effector of Bi2Te3, endowed with thermoelectric attributes, oscillated between thermal and thermoelectric field oscillations, thereby facilitating the diffusion of charge carriers responsive to near-infrared stimuli and modulating the doping state of the channel film to propel the operation of OPECTs. At the interface between Bi2Te3/MXene and the liquid medium, a sophisticated biosensing mechanism was integrated, involving immune competitive enzyme biocatalytic precipitation, which orchestrated target-dependent alterations in the channel current signal, thereby facilitating the detection of marine algal toxin okadaic acid with precision. This study provides near-infrared-stimulated photothermal- thermoelectric-driven OPECT devices, capable of amplifying microcurrents, and delineates novel operational frameworks and perspectives for optoelectronic interfacing with biological entities.

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