文献类型：期刊文献

英文题名：A 30 nm Nanopore Electrode: Facile Fabrication and Direct Insights into the Intrinsic Feature of Single Nanoparticle Collisions

作者：Gao, Rui[1];Ying, Yi-Lun[1];Li, Yuan-Jie[1];Hu, Yong-Xu[1];Yu, Ru-Jia[1];Lin, Yao[1];Long, Yi-Tao[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2018

卷号：57

期号：4

起止页码：1011

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20175204572757);WOS:【SCI-EXPANDED(收录号:WOS:000428208700025)】；

基金：lThis research is supported by the National Natural Science Foundation of China (21327807, 21711530216, 21421004), Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02-E00023), the Program of Shanghai Subject Chief Scientist (15XD1501200), and the Fundamental Research Funds for the Central Universities (222201718001, 222201717003, 222201714012).

语种：英文

外文关键词：confined nanopore electrodes; gold; interfaces; nanoparticles; nanopores

摘要：Clarifying the hidden but intrinsic feature of single nanoparticles by nanoelectrochemistry could help understand its potential for diverse applications. The uncontrolled interface and bandwidth limitation in the electrochemical measurement put the obstacle in single particle collision. Here, we demonstrate a well-defined 30 nm nanopore electrode with a rapid chemical-electrochemical fabrication method which provides a high reproducibility in both size and performance. A capacitance-based detection mechanism is demonstrated to achieve a high current resolution of 0.6 pA +/- 0.1 pA (RMS) and a high the temporal resolution of 0.01 ms. By utilizing this electrode, the dynamic interactions of every single particle in the mixture could be directly read during the collision process. The collision frequency is two orders of magnitude higher than previous reports, which helps reveal the hidden features of nanoparticles during the complex and multidimensional interaction processes.