【作者】 王晖； 陶农建； 王伟；

【Author】 Hui Wang;Nongjian Tao;Wei Wang;State Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University;Biodesign Center for Bioelectronics and Biosensors, Arizona State university;

【机构】 南京大学化学化工学院生命分析化学国家重点实验室； Biodesign Center for Bioelectronics and Biosensors, Arizona State university；

【摘要】 传统的电化学测量方法通常以整个电极界面为研究对象,测量的是电极界面的平均性质,难以进行电极表面不同位置的局域特性测量。随着扫描探针技术的出现,发展了以扫描电化学显微镜和扫描离子电导显微镜为典型代表的微区电化学测量方法。然而,特定电极探针的使用限制了电极表面成像的时间分辨率,同时对测量的电化学体系有一定的外在干扰。与此相比,光学显微镜显示出了高时空分辨、非侵入性、灵敏度高等诸多优势,可进行单分子成像研究。通过光学成像技术与电化学技术的联用,将表面等离激元共振和明场强度等光学信号转换为局部电流密度的电化学信号,实现了从微观角度解释局域电子转移动态机理[1-3]。该技术为研究微纳尺度下不同体系的电子传输性质提供了一种新思路,在电分析化学、能量转换和电化学传感器等应用研究中具有很大潜力。更多还原

【Abstract】 For conventional electrochemical methods, the whole electrode interface is normally taken as the study object and the avergae properties of it are measured. The analysis of local characteristics at various areas of electrode is limited. With the advent of scanning proce technology, micro-region electrochemical measuring methods with scanning electrochemical microscope and scanning ion conductance microscope as the typical representative have been developed. However, the applyment of specific probes limit the temporal resolution of imaging at electrode interface, and interfere the measured electrochemical system. By contrast, optical microscopy reveals many superiorities, such as high spatial-temporal resolution, non-invasive, and high sensitivity, and can be applied for the single-molcule imaging. Through the combination of optical imaging technique and electrochemical methods, the optical signals such as surface plasmon resonance and bright field intensity are converted into electrochemical signals of local current density, and the dynamic mechanism of local electron transfer is explained from the microscopic perspective. This technology exhitits an innovation for uncovering the electron transport properties of different systems at the micro and nano scale. It presents tremendous potential in the field of practical applications including electroanalytical chemistry, chemical energy conversion and electrochemical sensors.更多还原