Nanometer Scale Scanning Electrochemical Microscopy Instrumentation
Nanometer Scale Scanning Electrochemical Microscopy Instrumentation
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DOI：
10.1021/acs.analchem.6b03024
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发表时间：
2016-10-18
影响因子：
7.4
通讯作者：
Bard, Allen J.
中科院分区：
文献类型：
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作者：
Kim, Jiyeon;Renault, Christophe;Bard, Allen J.
我们报告所需的关键组件进行扫描电化学显微镜（SECM）与纳米级分辨率。详细介绍了纳米级SECM的软硬件仪器的构建和改进，包括：（1）用LabVIEW程序模拟SECM针尖的运动和电化学响应，（2）构造恒温室以稳定针尖和基底之间的纳米级间隙，（3）改进商用双恒电位仪以避免SECM实验中针尖的电化学损伤，以及（4）SECM阶段的构造，以避免SECM图像中的伪影。这些发现使我们能够成功地建立一个纳米级的SECM，它可以用来映射在一个典型的合奏样品中的单个纳米粒子的电催化活性和研究单个纳米结构的结构/反应性关系。
We report the crucial components required to perform scanning electrochemical microscopy (SECM) with nanometer-scale resolution. The construction and modification of the software and hardware instrumentation for nanoscale SECM are explicitly explained including (1) the LabVIEW code that synchronizes the SECM tip movement with the electrochemical response, (2) the construction of an isothermal chamber to stabilize the nanometer scale gap between the tip and substrate, (3) the modification of a commercial bipotentiostat to avoid electrochemical tip damage during SECM experiments, and (4) the construction of an SECM stage to avoid artifacts in SECM images. These findings enabled us to successfully build a nanoscale SECM, which can be utilized to map the electrocatalytic activity of individual nanoparticles in a typical ensemble sample and study the structure/reactivity relationship of single nanostructures.