Rotational diffusion of spherical colloids close to a wall

S. A. Rogers, M. Lisicki, B. Cichocki, J. K.G. Dhont, P. R. Lang

Research output: Contribution to journalArticlepeer-review


There is currently no experimental technique available to probe spatially resolved rotational diffusion of nanoparticles in the vicinity of a wall. We present the first experimental study of rotational diffusion of small spherical colloids, using dynamic evanescent wave scattering. A setup is used where the wave vector components parallel and perpendicular to the wall can be varied independently, and an expression is derived for the first cumulant of the intensity correlation function in VH evanescent wave geometry for optically anisotropic spheres. The experimental results are in agreement with theoretical predictions that take particle-wall hydrodynamic interactions into account.

Original languageEnglish (US)
Article number098305
JournalPhysical review letters
Issue number9
StatePublished - Aug 30 2012
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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