We describe direct imaging measurements of a colloidal sphere's diffusion between two parallel surfaces. The dynamics of this deceptively simple hydrodynamically coupled system have proved difficult to analyze. Comparison with approximate formulations of a confined sphere's hydrodynamic mobility reveals good agreement with both a leading-order superposition approximation as well as a more general all-images stokeslet analysis.
|Original language||English (US)|
|Number of pages||7|
|State||Published - Jan 11 2001|
ASJC Scopus subject areas
- Physics and Astronomy(all)