Diffusion through Colloidal Shells under Stress

ORAL

Abstract

The permeability of solids has long been associated with a diffusive process involving activated hopping. Tensile stress can affect the activation energy as originally envisioned by Eyring. Here we use liquid core - solid shell, core-shell, solid 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.

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Authors

  • J. Guery

    ESPCI

  • J. Baudry

    ESPCI

  • David Weitz

    Harvard University, SEAS, Harvard, Department of Physics, School of Engineering and Applied Sciences, Harvard University, Department of Physics, Harvard University, Cambridge, MA, Harvard

  • P.M. Chaikin

    New York University, Center for Soft Matter Research, New York University, NYU, Center for Soft Matter Research, NYU

  • J. Bibette

    ESPCI