Paper Number
PO65 

Session
Poster Session

Title
Fluctuations in charged systems: Electrolytes and colloidal suspensions

Presentation Date and Time
October 12, 2022 (Wednesday) 6:30

Track / Room
Poster Session / Riverwalk A

Authors (Click on name to view author profile)

1. Underhill, Patrick T. (Rensselaer Polytechnic Institute)

Author and Affiliation Lines (in printed abstract book)
Patrick T. Underhill
Rensselaer Polytechnic Institute, Troy, NY 12304

Speaker / Presenter 
Underhill, Patrick T.

Keywords
theoretical methods; computational methods; bio-fluids; colloids; pharmaceuticals; suspensions

Text of Abstract
Electrostatic interactions in charged systems can either cause self-assembly and structure formation or stabilize the system to prefer a uniform state. Classical models of electrostatic interactions and screening work best when at least one of the objects is dilute. At higher concentrations, correlations due to the long-ranged electrostatic interactions alter the behavior seen. This is relevant for applications such as concentrated electrolyte solutions and phase separation/precipitation in colloidal, polymer, and protein suspensions. In this poster, we will describe the results of applying a stochastic kinetic theory approach to concentrated charged systems. This method can capture fluctuations and correlations in systems with long-ranged interactions like electrostatic. In particular, we will show how the model produces under-screening in concentrated electrolytes and predicts macro- or micro-phase separation in colloidal suspensions.