Particle-ion and charged particle-charged particle interactions play a pivotal role in many aerosol systems; intentional charging can be used as a means to control particle trajectories towards measurements and particle based manufacturing processing, and charging also effects how particles interact with one another. However, collision dynamics between nanoparticles and ions in gas-phase systems are complex; they cannot be described by traditional continuum equations nor by free molecular approaches, and require consideration of the effects of the surrounding neutral gas as well as Coulomb potentials. Our group has developed Brownian Dynamics algorithms to examined charged particle collisional dynamics in the gas phase, and more recently implemented a combined continuum-molecular dynamics modeling approach to examine gas phase collisional reaction rates for charged species. We continue to refine this approach to examine a variety of gas phase reaction processes.
