Work

Iontronic microscopy of a tungsten microelectrode: “seeing” ionic currents under an optical microscope

Year: 2023

Type: article

Abstract: solution. Using the combination of the dark-field scattering microscope and the lock-in detection technique, we measure the phase and amplitude of local ion-concentration oscillations in response to an AC potential as the electrode potential is scanned through the redox-activity window of the dissolved species. We present the amplitude and phase map of this response, as such this method can be used to study the spatial and temporal variations of the ion-flux due to an electrochemical reaction close to metallic and semiconducting objects of general geometry. We discuss the advantages and possible extensions of using this microscopy method for wide-field imaging of ionic currents.

Source: Faraday Discussions

DOI: 10.1039/d3fd00040k

Authors: Zhu Zhang, Sanli Faez

Institution: Utrecht University

Language: English

Topic: Electrochemical Analysis and Applications

Subfield: Electrochemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Funders: Nederlandse Organisatie voor Wetenschappelijk Onderzoek, China Scholarship Council

Awards: G2017996281, G6408977315, G7636617635