Chemistry Commons^™

Imaging Of Metal Ion Dissolution And Electrodeposition By Anodic Stripping Voltammetry – Scanning Electrochemical Microscopy, Mario A. Alpuche-Aviles, John E. Baur, David O. Wipf

College of Arts and Sciences Publications and Scholarship

We have developed a new imaging method for SECM employing fast scan anodic stripping voltammetry (ASV) to provide sensitive and selective imaging of multiple chemical species at interfaces immersed in solution. A rapid CV scan (100 V/s) is used along with a short preconcentration time (300-750 ms) to allow images to be acquired in a normal SECM time frame. A Hg-Pt film electrode is developed having an equivalent Hg thickness of 40 nm that has good sensitivity at short preconcentration times and also retains thin-film behavior with high-speed voltammetric stripping. Fast scan anodic stripping currents are shown to be linear …