韩国裸舞

Kathleen Stebe
University of Pennsylvania

Particles at fluid interfaces can form highly ordered structures at fluid interfaces spontaneously by capillarity. The understanding of these interactions for spherical particles is well developed and widely exploited to make 2-D and 3-D ordered materials. Anisotropically shaped particles have far greater degrees of freedom, and can orient, align, and assemble into complex structures and networks that depend subtly on the particle shape and the shape of the interface which hosts the particles. In this talk, progress in developing a quantitative understanding of pair interactions between particles is described. Experiments on a variety of particle shapes are presented to illustrate a range of possibilities including assembly of particles with complex features in registry, docking sites, and the molding of particle aggregate structures by using the background shape of the interface to force new equilibrium alignments. Open issues associated with the structure and mechanical properties of aggregates, and their dependence on particle geometry and near-field particle interactions are described. These issues ultimately determine the mechanical response of particle-laden interfaces, important in particle stabilized (Pickering) emulsions and tailored colloidosomes.