Joel Koplik, City College of New York: Nanoparticles at a liquid/vapor interface

Colloidal particles at an interface have numerous applications to emulsion and foam stability, self-assembly and material fabrication and processing. while their dynamics involves issues of drag and diffusion, heterogeneity and interfacial pinning. Furthermore, for nanoparticles whose size may be  comparable to the width of the interface, continuum modeling may break  down. We show how molecular dynamics simulations of atomically-resolved  homogeneous and Janus nanoparticle systems can address these issues and  provide an understanding of hydrodynamic drag variation and hysteretic  phenomena in this situation.