光合器用于电催化异质性的直接成像
Joshua P Guerrette1, Stephen J Percival, Bo Zhang
1Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA.
Journal of the American Chemical Society
|December 19, 2012
概括
我们开发了启用光的电化学显微镜 (FEEM),用光学显微镜可视化电化学反应. 这种技术可以对分子运输进行成像,并在大型电极阵列上选电催化剂.
科学领域:
- 电化学 电化学 电化学
- 分析化学 分析化学
- 显微镜的使用方法
背景情况:
- 在各种科学领域,电化学过程至关重要.
- 绘制这些过程的图像,特别是短暂和异质的过程,带来了重大挑战.
- 现有的方法往往缺乏详细分析所需的空间和时间分辨率.
研究的目的:
- 引入光启用电化学显微镜 (FEEM) 作为一种新的成像技术.
- 为了证明FEEM在大型电极阵列上可视化电化学活动的能力.
- 展示FEEM在分子运输成像和电催化剂查方面的潜力.
主要方法:
- 使用封闭的双极电极将氧化和降解反应结合起来.
- 使用光显微镜检测生成的光产品.
- 将该方法应用于用于空间分辨率成像的大型微电极阵列.
主要成果:
- 通过一组碳纤维超微电极成功成像了氧化还原分析物的分子运输.
- 在用于选目的的基本电催化实验中展示了FEEM的应用.
- 在微电极阵列上实现空间和时间分辨率的电化学成像.
结论:
- FEEM提供了一种用于监测电化学过程的直接光学方法.
- 该技术适用于成像短暂事件,如神经元活动.
- FEEM提供了一种高通量方法,用于电催化剂的发现和表征.
相关概念视频
Super-resolution Fluorescence Microscopy
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Interfacial Electrochemical Methods: Overview
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Fluorescence and Phosphorescence: Instrumentation
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.


