Abstract: Self-pinning is a phenomenon intrinsic to the advancement or retraction of liquid/solid/vapor three-phase contact lines for nano-fluid droplets. Another relevant phenomenon is de-pinning, where an initially halted contact line is able to separate from the pinning particle and continue its advance (or retraction) across the surface. Herein, results from molecular dynamics simulations are presented to explore the particle effects during both pinning and de-pinning events. Results presented illustrate how particle size and concentration affects spreading kinetics and how this connects to dynamic droplet morphology that exist nearby the contact line region.
Authors: Baiou Shi, Weizhou Zhou, and Edmund Webb III
Keywords: particle size, particle concentration, droplet spreading, MD Simulations