文献类型：期刊文献

英文题名：Exploring dynamic interactions of single nanoparticles at interfaces for surface-confined electrochemical behavior and size measurement

作者：Ma, Hui[1,2];Chen, Jian-Fu[3,4];Wang, Hai-Feng[3,4];Hu, Pei-Jun[3,4,5];Ma, Wei[1];Long, Yi-Tao[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210023, Peoples R China;[3]East China Univ Sci & Technol, Ctr Computat Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[5]Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland

年份：2020

卷号：11

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000533936800031)】；

基金：This research was supported by the National Natural Science Foundation of China (21775043), Shanghai Municipal Natural Science Fund (19ZR1472100), Shanghai Pujiang Program (2019PJD010), the Research Foundation for Talented Scholars of Nanjing University (14912224), the Program of Introducing Talents of Discipline to Universities (B16017), the Fundamental Research Funds for the Central Universities (222201718001, 222201717003) and the China Postdoctoral Science Foundation (2019TQ0143, 2019M660108).

语种：英文

摘要：With the development of new instruments and methodologies, the highly dynamic behaviors of nanoparticle at the liquid-solid interface have been studied. However, the dynamic nature of the electrochemical behavior of individual nanoparticles on the electrode interface is still poorly understood. Here, we generalize scaling relations to predict nanoparticle-electrode interactions by examining the adsorption energy of nanoparticles at an ultramicroelectrode interface. Based on the theoretical predictions, we investigate the interaction-modulated dynamic electrochemical behaviors for the oxidation of individual Ag nanoparticles. Typically, significantly distinct current traces are observed owing to the adsorption-mediated motion of Ag nanoparticles. Inspired by restraining the stochastic paths of particles in the vicinity of the electrode interface to produce surface-confined current traces, we successfully realize high-resolution size measurements of Ag nanoparticles in mixed-sample systems. This work offers a better understanding of dynamic interactions of nanoparticles at the electrochemical interface and displays highly valuable applications of single-entity electrochemistry. Single-entity electrochemistry has been proposed for studying properties of single nanoparticles (NPs). Here, the authors make use of adsorption-mediated motion of Ag NPs to take individual NP size measurements using electrochemical impacts with excellent agreement to standard imaging techniques.