Xiao Kai, Tu Bin, Chen Lu, Heil Tobias, Wen Liping, Jiang Lei, Antonietti Markus
Max Planck Institute of Colloids and Interfaces, Department of Colloid Chemistry, 14476, Potsdam, Germany.
Laboratory of Theoretical and Computational Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.
Angew Chem Int Ed Engl. 2019 Sep 2;58(36):12574-12579. doi: 10.1002/anie.201907833. Epub 2019 Aug 2.
Conventional photosensing devices work mainly by electron processing and transport, while visual systems in intelligence work by integrative ion/electron signals. To realize smarter photodetectors, some photoionic device or the combination of ionic and electronic devices are necessary. Now, an ion-transport-based self-powered photodetector is presented based on an asymmetric carbon nitride nanotube membrane, which can realize fast, selective, and stable light detection while being self-powered. Local charges are continuously generated at the irradiated side of the membrane, and none (fewer) at the non-irradiated side. The resulting surface charge gradient in carbon nitride nanotube will drive ion transport in the cavity, thus realizing the function of ionic photodetector. With advantages of low cost and easy fabrication process, the concept of ionic photodetectors based on carbon nitride anticipates wide applications for semiconductor biointerfaces.
传统的光传感设备主要通过电子处理和传输来工作，而智能视觉系统则通过整合离子/电子信号来工作。为了实现更智能的光电探测器，需要一些光离子器件或离子与电子器件的组合。现在，基于不对称氮化碳纳米管膜提出了一种基于离子传输的自供电光电探测器，它可以在自供电的同时实现快速、选择性和稳定的光检测。在膜的受辐照侧会持续产生局部电荷，而在未受辐照侧则没有（或较少）电荷。氮化碳纳米管中产生的表面电荷梯度将驱动腔内的离子传输，从而实现离子光电探测器的功能。基于氮化碳的离子光电探测器具有成本低和制造工艺简单的优点，预计在半导体生物界面方面有广泛的应用。
