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Diffusion is a mechanism of mass transport that occurs due to random thermally-induced motions of the particles in the system.  Atomic or molecular diffusion can occur in all phases of matter.  We are investigating diffusion in solid systems with some element of structural disorder.  At this time we are using the method of Monte Carlo simulation applied to models with simple dynamics such as nearest-neighbor hopping of the particles with double-occupancy of a site being excluded. 

Two structural models have been investigated recently: the box fractal and a regular comb structure.

Box Fractal after 4 iterations of generator.
A regular comb lattice.

  Chris Wenwtworth, Professor of Physics
  Paul Garcia, physics major
  Dan Knowlton, physics major
 Trevor Torpin, physics major

Last updated: 4/14/2011