Specially synthesized silica colloidal spheres with fluorescent cores were used as model electrorheological fluids to experimentally explore structure formation and evolution under conditions of no shear. Using confocal scanning laser microscopy we measured the location of each colloid in three dimensions. We observed an equilibrium body-centered tetragonal phase and several nonequilibrium structures such as sheet-like labyrinths and isolated chains of colloids. The formation of nonequilibrium structures was studied as a function of the volume fraction, electric field strength, and starting configuration of the colloid. We compare our observations to previous experiments, simulations, and calculations.
Skip Nav Destination
Research Article| February 22 2000
Structure of electrorheological fluids
U. Dassanayake, S. Fraden, A. van Blaaderen; Structure of electrorheological fluids. J. Chem. Phys. 22 February 2000; 112 (8): 3851–3858. https://doi.org/10.1063/1.480933
Download citation file:
Don't already have an account? Register
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Could not validate captcha. Please try again.