Single-File Diffusion of Colloids in One-Dimensional Channels
Abstract
Single-file diffusion, prevalent in many processes, refers to the restricted motion of interacting particles in narrow micropores with the mutual passage excluded. A single-filing system was developed by confining colloidal spheres in one-dimensional circular channels of micrometer scale. Optical video microscopy study shows evidence that the particle self-diffusion is non-Fickian for long periods of time. In particular, the distribution of particle displacement is a Gaussian function.
- Publication:
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Science
- Pub Date:
- January 2000
- DOI:
- 10.1126/science.287.5453.625
- Bibcode:
- 2000Sci...287..625W
- Keywords:
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- CHEMISTRY