For more information about this meeting, contact Andrew Belmonte, Hope Shaffer.
|Title:||Two Tales of Colloidal Eigenvalues|
|Seminar:||The Pritchard Lab Seminar|
|Speaker:||Darrell Velegol, Dept of Chemical Engineering, Penn State|
|Journals often show pretty images of experiments. But is there ever any real science or analysis behind those experiments? In this talk I will show two examples where eigenvalue problems have great importance in obtaining pure samples of colloidal assemblies. Colloidal particles are nanometers to micrometers in size, and are suspended in a fluid. Common examples include paint or even milk. But exciting possibilities exist today with assembling together colloidal particles to make very small machines or devices. The precise assembly of these nanoscale particles requires a detailed knowledge of the physical forces between them. I will show how an eigenvalue problem leads to the calculation of van der Waals forces between nanoparticles. In addition, the separation of good assemblies from poor assemblies is a challenging problem. I will show how the Rayleigh-Benard instability leads to more effective separations. In this talk I will show the essential problems – which have involved some excellent collaborations – demonstrate the current state of our solutions, and shamelessly invite your expert advice or collaboration.|
Room Reservation Information
|Date:||11 / 10 / 2008|
|Time:||11:15am - 12:15pm|