Chronoamperometric Sizing and Locating of Spherical Particles via Potential-Step Transients
Chronoamperometric Sizing and Locating of Spherical Particles via Potential-Step Transients
复制标题
通过电位阶跃瞬变对球形颗粒进行计时电流分析和定位
DOI：
10.1021/jp070429d
复制
发表时间：
2007
影响因子：
3.7
通讯作者：
R. Compton
中科院分区：
文献类型：
--
作者：
N. Fietkau;Guoqing Du;S. Matthews;M. Johns;A. A. C. Fisher;R. Compton
球形玻璃颗粒的精确尺寸，它与微盘电极中心的距离，以及它在三个非共线微盘电极阵列中的确切位置，都是通过简单的科特雷氏式电位步长计时安培实验来确定的。为了首先阐明玻璃球的大小及其与电极中心的距离，将球体放置在球体中心与电极中心之间的任意距离上，并记录电位阶跃瞬态。然后通过比较实验电流-时间响应和晶格玻尔兹曼模拟，推导出球体的大小和中心到中心的距离。然后，通过在电化学测量时对球体半径和中心到中心距离的微观测量，可以独立地确定球体半径及其到电极中心的距离。其次，球体的位置在一个所谓的“三角”中被阐明。
The precise size of a spherical glass particle, its distance from the center of a microdisk electrode, and its exact location within an array of three noncollinear microdisk electrodes are determined by using simple Cottrellian-like potential-step chronoamperometric experiments. To first elucidate the size of a glass sphere and its distance from the center of the electrode, the sphere was positioned at arbitrary distances between the center of the sphere and the center of the electrode and a potential-step transient was recorded. The size of the sphere and the center-to-center distance is then deduced by comparison of the experimental current−time response with lattice Boltzmann simulations. The radius of the sphere and its distance from the center of the electrode is then confirmed, independently, by a microscopic measurement of the radius of the sphere and the center-to-center distance at the time of the electrochemical measurement. Second, the location of the sphere is elucidated in a so-called “triang...