Measurements of the near-wall hindered diffusion of colloidal particles in the presence of an electric field

Yutaka Kazoe, Minami Yoda

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Understanding near-wall diffusion of small particles and biomolecules is important in colloid science and many microfluidic devices. Our experimental measurements of the diffusion of 110-460 nm radii suspended particles in the presence of electric fields up to 3.1 kV/m using particle tracking are in agreement with theoretical predictions for diffusion hindered by the presence of a solid surface. The results suggest that the external electric field has little, if any, effect upon the hindered diffusion of colloidal particles, even when the electrophoretic force exceeds the Stokes drag.

Original languageEnglish
Article number124104
JournalApplied Physics Letters
Volume99
Issue number12
DOIs
Publication statusPublished - 2011 Sep 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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