文献类型：期刊文献

中文题名：闭合式无线纳米孔电极的一步法制备及单颗粒检测研究

英文题名：One-step Method for Fabrication of Closed Wireless Nanopore Electrode and Its Application on Single Nanoparticle Detection

作者：许素文[1];应佚伦[1,2];龙亿涛[2]

机构：[1]华东理工大学化学与分子工程学院,上海200237;[2]南京大学化学化工学院,生命分析化学国家重点实验室,南京210023

年份：2019

卷号：40

期号：10

起止页码：2075

中文期刊名：高等学校化学学报

外文期刊名：Chemical Journal of Chinese Universities

收录：CSTPCD;;EI(收录号：20194907790367);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000504312500006)】；北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：Supported by the National Natural Science Foundation of China(Nos. 61871183, 21834001).

语种：中文

中文关键词：无线纳米孔电极;电化学限域;纳米电化学;单个体电化学

外文关键词：Wireless nanopore electrode;Electrochemically confined effect;Nano-electrochemistry;Single entity electrochemistry

摘要：以锥形石英固体纳米孔为模板,通过化学法制备具有金纳米结构的纳米孔尖端,从而实现一步法简单、快速地制备直径为30 nm的闭合式无线纳米孔电极(CWNE);探讨了制备过程中反应物浓度对制备过程的影响,制备成功率高达85.7%,RMS噪音低至4.2 pA.以金纳米颗粒碰撞电极实验为电化学测量模型,获得了单个颗粒与纳米孔电极相互作用的信号,验证了闭合式无线纳米孔电极对微秒级电信号的皮安级电流分辨能力,为进一步探索纳米界面上的电子传递过程提供了稳定的测量界面.
We developed a one-step method based on the chemical reduction of HAuCl4 to fabricate a closed wireless nanoelectrode( CWNE) which provides a high reproducibility in both electrode size and signal-to-noise ratio. By studing the reactant concentration,the successful ratio for fabricating 30 nm CWNE is increased to85. 7% and RMS noise value is decreased to 4. 2 pA. Furthermore,the CWNE was applied in the single nanoparticle collision detection which shows a high current resolution at picoampere level and a high temporal resolution at microsecond level. Therefore,the CWNE could be further benefit to achieve the accurate nano-electrochemical measurements.