High-Speed Electrochemical Imaging
High-Speed Electrochemical Imaging
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DOI：
10.1021/acsnano.5b02792
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发表时间：
2015-09-01
期刊：
影响因子：
17.1
通讯作者：
Unwin, Patrick R.
中科院分区：
文献类型：
--
作者：
Momotenko, Dmitry;Byers, Joshua C.;Unwin, Patrick R.
报道了高速扫描电化学探针显微镜的设计、研制和应用。该方法允许以接近每帧4秒的速率获取一系列高分辨率图像（通常为1000像素μ m（-2）），同时每秒收集高达8000个图像像素，比迄今为止使用的典型成像速度快约1000倍。重点是扫描电化学电池显微镜（SECCM），但其原理和实用性适用于许多电化学成像方法。高速扫描概念的多功能性在各种基板上得到了证明，包括对金上图案化自组装单层的电活性进行成像，对单壁碳纳米管处发生的化学反应进行可视化，以及探测用于水裂解的纳米级电催化剂。这些研究提供了电化学通量的空间变化的电影作为电位的函数，并为进一步发展与其他电化学成像技术的高速扫描提供了平台。
The design, development, and application of highspeed scanning electrochemical probe microscopy is reported. The approach allows the acquisition of a series of high-resolution images (typically 1000 pixels mu m(-2)) at rates approaching 4 seconds per frame, while collecting up to 8000 image pixels per second, about 1000 times faster than typical imaging speeds used up to now. The focus is on scanning electrochemical cell microscopy (SECCM), but the principles and practicalities are applicable to many electrochemical imaging methods. The versatility of the high-speed scan concept is demonstrated at a variety of substrates, including imaging the electroactivity of a patterned self-assembled monolayer on gold, visualization of chemical reactions occurring at single wall carbon nanotubes, and probing nanoscale electrocatalysts for water splitting. These studies provide movies of spatial variations of electrochemical fluxes as a function of potential and a platform for the further development of high speed scanning with other electrochemical imaging techniques.