Probing the Speed Limits of Scanning Electrochemical Microscopy with In situ Colorimetric Imaging
Probing the Speed Limits of Scanning Electrochemical Microscopy with In situ Colorimetric Imaging
复制标题
利用原位比色成像探索扫描电化学显微镜的速度极限
DOI:
10.1002/celc.202000476
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发表时间:
2020
期刊:
影响因子:
4
通讯作者:
Esposito, Daniel V.
中科院分区:
文献类型:
--
作者:
Dorfi, Anna E.;Zhou, Shijie;West, Alan C.;Wright, John;Esposito, Daniel V.
Due to the complex nature of probe/substrate interactions in scanning electrochemical microscopy (SECM), SECM has been primarily limited to well‐defined probe geometries and slow scan speeds that reduce imaging throughput. Herein, we show thatin situcolorimetric visualization of concentration gradients using pH indicator dyes during SECM measurements can be a powerful tool for understanding the coupled influences of probe geometry and scan speed on the dynamics of localized plumes of electroactive species that mediate probe/substrate interactions. Colorimetric images of plumes generated at a band electrode reveal that probe geometry strongly influences linescan signal distortion and hysteresis at scan speeds surpassing the conventional SECM “speed limit”. Combining mechanistic information fromin situcolorimetric imaging with transport models, this article reports design principles that have the potential to enable quantitative SECM with novel probe geometries and at imaging rates that are at least an order of magnitude faster than currently employed.
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影响因子:
8.4
作者:
Yixian Wang;K. Kececi;J. Velmurugan;M. Mirkin
通讯作者:
M. Mirkin
影响因子:
6.6
作者:
A. Lesch;Dmitry Momotenko;F. Cortés-Salazar;Folkert Roelfs;H. Girault;G. Wittstock
通讯作者:
A. Lesch;Dmitry Momotenko;F. Cortés-Salazar;Folkert Roelfs;H. Girault;G. Wittstock
影响因子:
3.3
作者:
Shao, YH;Mirkin, MV
通讯作者:
Mirkin, MV
影响因子:
7.4
作者:
FIEDLER, S;HAGEDOM, R;FUHR, G
通讯作者:
FUHR, G
影响因子:
17.1
作者:
Momotenko, Dmitry;Byers, Joshua C.;Unwin, Patrick R.
通讯作者:
Unwin, Patrick R.