Department of Physics

Department News

Physics Seminar on Self-Organizing Nano Structures on Friday April 9th.

Apr 6, 2010

Diffusion-Driven Self-Organization of Novel Structures at the Nanoscale

Speaker: Professor Kelly Roos
Date: April 09, 2010 (Friday)
Time: 4 PM
Room: 205 Currens Hall

Surface diffusion is an important atomistic process that mediates the formation of nanostructures and thin films at surfaces. It plays a significant role in self-assembly, the tendency of some systems to create order on surfaces without direct external manipulation. Of particular importance for self-assembly is mesoscopic-scale diffusion, defined as the collective contribution from a large number of individual diffusion processes to mass transport in materials systems, that ultimately culminates in the arrangement of material into ordered structures. It is this mesoscopic-scale diffusion that makes self-assembly the only practical method for building ensembles of nanostructures In this talk I will describe the physics behind some of the instruments that are used to probe surface structure on the atomic scale, and then describe a series of experiments tailored to study mesoscopic diffusion fields. If time permits I may describe some details of the continuum model I and my collaborators have developed to describe the experiments.