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

Yutaka Kazoe; Minami Yoda

doi:10.1063/1.3643136

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 journal › Article › peer-review

38 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 language	English
Article number	124104
Journal	Applied Physics Letters
Volume	99
Issue number	12
DOIs	https://doi.org/10.1063/1.3643136
Publication status	Published - 2011 Sept 19
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3643136

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title = "Measurements of the near-wall hindered diffusion of colloidal particles in the presence of an electric field",

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.",

author = "Yutaka Kazoe and Minami Yoda",

note = "Funding Information: Y.K. was supported by Research Fellowship 20-3770 from the Japan Society for the Promotion of Science for Young Scientists. This work was sponsored by National Science Foundation awards CBET-0828782 and 0933360. We also thank Q. Guo and S. V. Behrens in Chemical and Biomolecular Engineering at Georgia Tech for the light scattering measurements and J. P. Alarie and J. M. Ramsey in the Department of Chemistry at the University of North Carolina for providing the microchannels.",

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AU - Yoda, Minami

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PY - 2011/9/19

Y1 - 2011/9/19

N2 - 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.

AB - 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.

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

Abstract

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