Jianlong Ji , Jiahao Liu , Yifei Wang , Fan Zhang , Min Zhao , Sheng Yan , Xiaoliang Guo , Wendong Zhang , Shengbo Sang , Xiaojie Chai , Qijun Sun
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引用次数: 0
摘要
浮栅有机电化学晶体管(OECT)采用了独特的信号采集和放大结构。这种设计有两个主要优点:首先,它可以减轻传感过程中的非特异性物理吸附影响,防止副反应产物污染电解质溶液,从而提高检测精度。其次,它可以增加栅极/电解质电容,优化 OECT 的信号放大能力。到目前为止,传感电极和控制栅极的优化仍不明确。目前的研究采用光敏液固异质结作为控制栅极。这一选择是基于以下观察结果:-0.43 V 的光电电压不受电极面积变化的影响,而面积缩小导致的光电流减少可以被光照强度的增加所抵消。此外,鉴于液固异质结的电容值(4.386×10-2 F)在光辐射期间明显超过等效电路中的其他元件,这些异质结可被视为自驱动和准无极性。我们通过检测皮质醇分子证实了这种结构配置的可行性。这种光敏液固异质结的潜在应用在于构建高密度、高稳定性的生物传感器,这在实际应用中是必不可少的。
The floating-gate organic electrochemical transistor (OECT) employs a distinct signal acquisition and amplification structure. This design offers two primary advantages: firstly, it mitigates the effects of non-specific physical adsorption during the sensing process and prevents contamination of the electrolyte solution by side reaction products, thereby enhancing detection accuracy. Secondly, it allows for an increased gate/electrolyte capacitance, optimizing the OECT’s signal amplification capability. Until now, optimizing the sensing electrode and control gate remains ambiguous. This current research uses a photosensitive liquid-solid heterojunction as the control gate. This choice is based on the observation that the photovoltage of −0.43 V remains unaffected by variations in electrode area, and any reduction in photocurrent due to area reduction can be offset by an increase in light intensity. Furthermore, given that the capacitance value of liquid-solid heterojunctions (4.386×10−2 F) significantly surpasses other components in equivalent circuits during light radiation, these heterojunctions can be considered self-driving and quasi-non-polarized. We confirmed the viability of this structural configuration through cortisol molecule detection. The potential application of this photosensitive liquid-solid heterojunction lies in constructing high-density and high-stability biosensors, a necessity in practical applications.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.