Probing charge screening dynamics and electrochemical processes at the solid–liquid interface with electrochemical force microscopy

Liam Collins, Stephen Jesse, Jason I. Kilpatrick, Alexander Tselev, Oleksandr Varenyk, M. Baris Okatan, Stefan A.L. Weber, Amit Kumar, Nina Balke, Brian Rodriguez, Sergei V. Kalinin, Brian J. Rodriguez

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)
228 Downloads (Pure)

Abstract

The presence of mobile ions complicates the implementation of voltage-modulated scanning probe microscopy techniques such as Kelvin probe force microscopy (KPFM). Overcoming this technical hurdle, however, provides a unique opportunity to probe ion dynamics and electrochemical processes in liquid environments and the possibility to unravel the underlying mechanisms behind important processes at the solid–liquid interface, including adsorption, electron transfer and electrocatalysis. Here we describe the development and implementation of electrochemical force microscopy (EcFM) to probe local bias- and time-resolved ion dynamics and electrochemical processes at the solid–liquid interface. Using EcFM, we demonstrate contact potential difference measurements, consistent with the principles of open-loop KPFM operation. We also demonstrate that EcFM can be used to investigate charge screening mechanisms and electrochemical reactions in the probe–sample junction. We further establish EcFM as a force-based imaging mode, allowing visualization of the spatial variability of sample-dependent local electrochemical properties.
Original languageEnglish
Article number3871
Number of pages17
JournalNature Communications
Volume5
DOIs
Publication statusPublished - 20 May 2014

Fingerprint

Dive into the research topics of 'Probing charge screening dynamics and electrochemical processes at the solid–liquid interface with electrochemical force microscopy'. Together they form a unique fingerprint.

Cite this