Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Z14: Electrostatic Self-Assembly
11:30 AM–2:18 PM,
Friday, March 10, 2023
Room: Room 206
Sponsoring
Units:
DSOFT DPOLY DFD
Chair: Saurabh Nath, Massachusetts Institute of Technology
Abstract: Z14.00004 : Nucleation around a charged particle in a polar environment*
12:06 PM–12:18 PM
Presenter:
Roni Kroll
(Ben-Gurion University of the Negev)
Authors:
Roni Kroll
(Ben-Gurion University of the Negev)
Yoav Tsori
(Ben-Gurion University of the Negev)
Collaboration:
Roni Kroll, Yoav Tsori
We developed a mean-field model for nucleation around a charged particle, such as an aerosol or dust particle, surrounded by vapor of a polar fluids. In the first part of the work, we generalized the Thomson model to polar fluids, by assuming a well-defined liquid-vapor interface and existence of dissociated ions. By solving the Poisson-Boltzmann equation, we obtained the electrostatic potential and energy barrier for nucleation. The model reduces to the Thomson model where the Debye screening length is very large, and to electro-wetting when the Debye's length is very small.
In the second part, we looked at nucleation outside of the binodal, for undersaturated vapor. We minimized the Gibbs energy to find the fluid density profiles as a function of distance from the particle, depending on the undersaturation, temperature and salt concentration. The phase diagram showing where this special charge-induced nucleation occurs is calculated.
*Israel Science Foundation
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