Weeks Lab Research
Boundary Mobility Controls Dynamics in Confined Colloidal Glasses
Professor Eric Weeks and Emory Physics PhD graduates Gray Hunter and Kazem Edmond have used suspensions of colloidal particles in emulsion droplets to observe how soft confinement effects glassy dynamics. This article shows conclusively that motions within a confined colloidal glass are governed by the mobility of the confining boundary. Prior to these experiments, evidence for these phenomena in molecular liquids has been indirect. Hence, the paper demonstrates a level of universal physics among disparate glassy systems and further extends the analogy between molecular and colloidal glasses.
This research was published in Physical Review Letters, 112, 218302 (2014). DOI: 10.1103/PhysRevLett.112.218302