Nanoscale electrochemical charge transfer kinetics investigated by electrochemical scanning microwave microscopy.

ABSTRACT: We show how microwave microscopy can be used to probe local charge transfer reactions with unprecedented sensitivity, visualizing surface reactions with only a few hundred molecules involved. While microwaves are too fast under classical conditions to interact and sense electrochemical processes, this is different at the nanoscale, where our heterodyne microwave sensing method allows for highly sensitive local cyclic voltammetry (LCV) and local electrochemical impedance spectroscopy (LEIS). LCV and LEIS allow for precise measurement of the localized charge transfer kinetics, as illustrated in this study for a ferrocene self-assembled monolayer immersed in an electrolyte. The theoretical analysis presented here enables a consistent mapping of the faradaic kinetics and the parasitic contribu

SUBMITTER: Awadein M 

PROVIDER: S-EPMC9890956 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature