Test of the diffusing-diffusivity mechanism using near-wall colloidal dynamics
Biological Physics
2016-03-03 v2 Soft Condensed Matter
Abstract
The diffusing-diffusivity mechanism proposed by Chubynsky and Slater [PRL 113, 098302, 2014] predicts that, in environments where the diffusivity changes gradually, the displacement distribution becomes non-Gaussian, even though the mean-squared displacement (MSD) grows linearly with time. Here, we report single-particle tracking measurements of the diffusion of colloidal spheres near a planar wall. Because the local effective diffusivity is known, we have been able to carry out the first direct test of this mechanism for diffusion in inhomogeneous media.
Cite
@article{arxiv.1602.07644,
title = {Test of the diffusing-diffusivity mechanism using near-wall colloidal dynamics},
author = {Mpumelelo Matse and John Bechhoefer},
journal= {arXiv preprint arXiv:1602.07644},
year = {2016}
}
Comments
This paper has been withdrawn by the author because of crucial calibration errors