Wednesday Colloquium: Dr. Anthony D. Dinsmore, University of Massachusetts Amherst  Add To Calendar

  • Date(s): Wednesday, 11/19 3:00 PM to Wednesday, 11/19 4:00 PM
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  • Campus Address: 238 SES (Science and Engineering South)

Title: Liquid Interfaces and Solid particles: geometry, interactions, and new materials

Abstract: The interface between two liquids - such as the surface of a water droplet in oil - provides a versatile platform for arranging small particles into functional membranes and other materials. Owing to the large energy cost of the fluid interface, nanometer-to-micron-sized colloidal particles readily adsorb at the interface and are confined there. While this adsorption phenomenon has been used in industry for decades, it continues to raise fundamentally fascinating and technologically relevant questions. I will describe recent work developing materials for applications ranging from encapsulation & delivery to electronics. I will also describe recent work on curved interfaces, where a geometric frustration arises from the contact condition on the adsorbed particle and causes extended interfacial deformations. The deformation, in turn, gives rise to interactions among adsorbed particles. This interplay between geometric frustration and long-range forces arises in a variety of soft materials including emulsions and cell membranes.

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