Size-Dependent Voltammetry at Single Silver Nanoelectrodes
Size-Dependent Voltammetry at Single Silver Nanoelectrodes
复制标题
单银纳米电极的尺寸依赖性伏安法
DOI：
10.1021/acs.analchem.8b02644
复制
发表时间：
2018
影响因子：
7.4
通讯作者：
Li Yongxin
中科院分区：
文献类型：
--
作者：
Hua Hongmei;Liu Yong;Wang Dongmei;Li Yongxin
在单粒子/电极水平上理解金属纳米结构电氧化的动力学和热力学是非常重要的。在这项工作中，单银纳米电极的半径下降到10 nm的激光辅助拉技术制造。制备的不同半径的单个银纳米电极具有尺寸依赖的伏安特性，通过测量电子转移速率，发现电子转移动力学过程是快速的，而随着半径的减小，负电位的移动则是有利的热力学过程。我们的方法提供了一个有意义的尝试，研究电子转移动力学和热力学在单个纳米粒子/纳米电极水平。
Understanding the kinetics and thermodynamics of electro-oxidation of metal nanostructures at single particles/electrodes level is extremely important. In this work, single silver nanoelectrodes with the radii down to 10 nm were fabricated by a laser-assisted pulling technique. Size-dependent voltammetry could be observed using prepared single silver nanoelectrodes with different radii, which involved a fast electron-transfer kinetics process through measuring electron-transfer rate and a favorable thermodynamics process from the negative potential shift with the decrease of radii. Our method provided a meaningful attempt to investigate electron-transfer kinetics and thermodynamics at single nanoparticles/nanoelectrodes level.