Diffusion through colloidal shells under stress.
The permeability of solids has long been associated with a diffusive process involving activated mechanism as originally envisioned by Eyring. Tensile stress can affect the activation energy but definitive experiments of the diffusion rate of species through a stressed solid are lacking. Here we use core-shell (liquid core-solid shell) colloidal particles that are sensitive to osmotic pressure to follow the permeation of encapsulated probes at various stresses. We unambiguously show that the tensile stress applied on colloidal shells linearly reduces the local energy barrier for diffusion.
Guery
J
J
Laboratoire Colloïdes et Matériaux divisés, ESPCI ParisTech, UPMC, CNRS UMR 7195, 10 rue Vauquelin, 75005 Paris, France.
Baudry
J
J
Weitz
D A
DA
Chaikin
P M
PM
Bibette
J
J