Potential fluctuations in the electric double-layer at the molecular scale
Thu, Apr. 20, 2023, 4:30pm
Taylor Auditorium, Frick Chemistry Lab B02
Host: Will Jacobs
The electric double-layer forms at the interface between an electrode and an electrolyte solution and sets the stage for a wide range of microscopic electrochemical processes. The structure of the double-layer is typically described using continuum level models, such as those derived from the pioneering efforts of Gouy, Chapman, and Stern. While continuum-based models provide an efficient and intuitive framework for studying and understanding the macroscopic behavior of electrochemical systems, they are inappropriate for modeling the time and length scales inherent to individual electrochemical reactions. Over these scales – generally nanoseconds and nanometers – the discrete molecular nature of the electrolyte is apparent. In this seminar, I will present results of theory and simulation that explore the profile of the electrostatic potential near an electrified interface and how this profile fluctuates both in and out of equilibrium.