Interaction potential trick

Experimentally, the probability P(r) of finding two colloidal particles with separation r can be measured via optical microscope. Such probability is related to the free energy U(r) of the system through the Boltzman relation: P(r) ~ Exp[-U(r)/K_BT].

Based upon these, the interaction free energy can be measured by taking the natural logarithm of the equilibrium probability distribution of the two colloidal particles.

Reference: Ritu Verma, J. C. Crocker, T. C. Lubensky, and A. G. Yodh, Phys.Rev.Lett., Vol.81, Pg.4004, 1998.

Ideas about Research Blogging

I got into this blog by chance during today's lunch time. I was really amazed about the way they use blog to discuss research ideas, post news update. Maybe I should follow this example in the near future.

http://amdnews.blogspot.com/

The First Post Ever Since

Hello, World!