K-Dependent Brownian Diffusion Constant In A Critical Mixture

The K ‐dependent diffusion constant of 0.3μ Teflon particles in the critical mixture isooctane‐nitroethane has been measured for 0.001 < T − T c < 2 °C. The results are presented along with a simple theory that gives good agreement by considering the surface energy force on the particle due to concentration fluctuations.