Levich Institute Seminar Announcement, 08/30/2011
Tuesday, 08/30/2011
2:00 PM
Steinman Hall, Room #312
(Chemical Engineering Conference Room)

Professor Anthony Dinsmore
University of Massachusetts
Department of Physics

"Liquid Interfaces and Solid Particles: From Simple Geometry to Novel Materials"


ABSTRACT


The interface between two liquids as on the surface of a water droplet in oil provides a versatile platform for assembly of small particles to make functional membranes, capsules, and other materials. Owing to the large interfacial tension, nanometer-to-micron-sized colloidal particles readily adsorb at the interface and become confined there. In this talk, I will describe recent studies of the binding of colloidal spheres at anisotropically curved liquid interfaces, where binding causes deformation of the interface and induces capillary interactions. I will also describe recent measurements of the binding energy of nanoparticles at liquid interfaces and the application of this approach to make functional electronic devices with microscopic liquid-metal droplets. These results provide new insight into capillary forces in general, especially the role of interface geometry. They also may help explain the stability of particle-stabilized (Pickering) emulsions and point the way to new methods of directed assembly of small particles.

BRIEF ACADEMIC/EMPLOYMENT HISTORY
  • 2007 - present: Associate Professor of Physics at UMass Amherst
  • 2001-2007: Assistant Professor of Physics at UMass Amherst
  • 1999-2001: Postdoc with Dave Weitz at Harvard Physics and Div Eng and Applied Science
  • 1997-1999: Postdoc with Banahalli Ratna, Naval Research Laboratory
  • 1997: PhD in Physics from UPenn. Advisor: Prof Arjun Yodh

RECENT RESEARCH INTERESTS:
  • Self-assembly of particles (experimental)
  • Dynamics of phase transitions in two and three dimensions
  • Structure of lipid membranes and the role of curvature in the function of membrane-bound proteins