文献类型：期刊文献

英文题名：Color-coded imaging of electrochromic process at single nanoparticle level

作者：Jing, Chao[1,2,3];Gu, Zhen[1,2];Xie, Tao[1,2];Long, Yi-Tao[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Tech Univ Munich, Phys Dept E20, James Franck Str 1, D-85748 Garching, Germany

年份：2016

卷号：7

期号：8

起止页码：5347

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20163002648110);WOS:【SCI-EXPANDED(收录号:WOS:000380893900068)】；

基金：This research was supported by the National Natural Science Foundation of China (21327807, 21421004), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning (YJ0130504), and the Postdoctoral Council of China (2015 International Postdoctoral Exchange Fellowship Program).

语种：英文

外文关键词：Cyclic voltammetry - Electrodes - Energy transfer - Nanoparticles - Throughput - Chemical detection - Chromophores - MATLAB - Electrochromism

摘要：Electrochromic materials have attracted increasing attention in the field of smart devices and energy economy due to their excellent reversible chromic properties. Investigating an electrochromic process at the nano-scale is beneficial to the development of functional nano-devices exploiting chromophores. In this study, a new method for real-time imaging of an electrochromic process at the single nanoparticle level is developed based on an ultra-sensitive plasmon resonance energy transfer (PRET) technique. The scattering light intensity of nanoparticles is applied to reveal energy transfer from nanoparticles to chromophores modulated by an electrochromic reaction. This PRET-based technique achieves the detection of hundreds of molecules on the surface of a single nanoparticle. Furthermore, a color-coded amplifying method has been introduced for high-throughput, converting light intensity into easily recognized colors via the Matlab program. Compared with traditional electrochemical imaging techniques, this facile and rapid approach using optical techniques to characterize a real-time electrochemical process significantly enhances detection sensitivity, time and spatial resolution. Notably, the obtained electrochromic behavior of chromophores on a single nanoparticle is in good agreement with the simulated cyclic voltammetry (CV) curves on a nano-electrode. Therefore, this study provides a promising way to simultaneously monitor electrochromic reactions on single nano-electrodes with high-throughput.