25.06, 16:00-16:20

Wang Mu, Hill R.J.
Electrical microrheology of hydrogel nanocomposites.

Canada / Канада

We report the results of numerical and analytical calculations of the steady and dynamic particle displacements when electric fields are applied to hydrogel-colloid composites. At low frequencies, the particle-displacement dynamics reflect the hydrodynamic permeability, compressibility and stiffness of the polymer skeleton, whereas the dynamics at high frequencies reflect only the shear modulus of the polymer. Our theory provides a rigorous basis for interpreting electrical microrheology and electroacoustic experiments on this novel class of soft matter.