Abstract
Feed-back of chemical stresses on diffusion has been investigated. A membrane of isotropically elastic material with different boundary conditions of the constant surface chemical potential, constant surface stresses, one-side constant surface concentration, and two-side constant surface concentration is considered. The diffusivity was found to increase when the chemical stresses fed back to diffusion. When feed-back of chemical stresses on diffusion was not considered, two-side charging and one-side charging had the same concentration profile, but different chemical stresses. Bending exists in the latter but not the former. These chemical stresses cause the change of effective diffusivity and result in different concentration redistribution. When the effect of chemical stresses on diffusion is considered, the concentration profile is always greater for the two-side charging than for the one-side charging.