报 告 人：林 鹏

报告题目：Organic Photoelectrochemical Transistors for Ultrasensitive Biosensors

时 间：2019年6月26日（星期三）上午10:00

地 点：材料楼A307

报告人简介：

林鹏，2012年获香港理工大学应用物理学博士学位；2012-2013年在香港大学电机电子工程系从事博士后研究，现任深圳大学材料学院副教授。主要从事薄膜晶体管及其生物传感研究，已在Adv. Mater.、Adv. Funct. Mater.、Nano Lett.、ACS Nano等国际著名期刊上发表学术论文60余篇；总被引用超过2000次，其中有6篇单篇被引用超过100次，单篇最高被引用600多次；H指数18；撰写英文专著一章；申请中国发明专利、PCT国际专利等16项；主持国家自然科学基金（面上、青年）等多项科研项目。

报告摘要：

Organic bioelectronics have shown promising applications for various sensing purposes due to their significant advantages in term of high flexibility, portability, easy fabrication, and biocompatibility. Here we report a new type of organic device, organic photoelectrochemical transistor (OPECT), which is the combination of an organic electrochemical transistor (OECT) and a photoelectrochemical (PEC) gate electrode modified with CdS quantum dots (QDs). Thanks to the inherent amplification function of the transistor, the OPECT-based biosensor exhibits much higher sensitivity than that of a traditional biosensor. The sensing mechanism of the OPECT is attributed to the charge transfer between the photosensitive semiconductor CdS QDs and the gate electrode. In an OPECT-based DNA sensor, target DNA is labelled with Au nanoparticles and captured on the gate electrode, which can influence the charge transfer on the gate caused by the exciton-plasmon interactions between CdS QDs and Au nanoparticles. Consequently, a highly sensitive and selective DNA sensor with a detection limit of around 1 fM is realized. Based on the new sensing platform of OPECTs, we have developed many other ultrasensitive biosensors for the detection of various biomoleculars, such as botulinum neurotoxin A (BoNT/A), Salmonella, and so on. It is expected that OPECTs can be developed as a high-performance platform for numerous biological detections in the future. This work also provides a different technical perspective for the further development and implementation of organic bioelectronics.

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南昌大学科技处、材料科学与工程学院

2019年6月24日