Particle-wall interactions in micro/nanochannels

A. T. Conlisk, Harvey Zambrano, Haifeng Li, Yutaka Kazoe, Minami Yoda

Research output: Contribution to conferencePaper

4 Citations (Scopus)

Abstract

The objective of the present paper is to review the fundamental theory of the motion of a collection of colloidal particles near solid walls and to compare theoretical computations with the experiments conducted by Kazoe and Yoda1 for electroosmotic flow. Under-standing the near-wall transport of suspended particles is also relevant to a number of microfluidic applications where a two-or three-dimensional array of colloidal particles is assembled on a solid substrate. We first discuss methods of describing the motion of single colloidal particles and subsequently show an approach to describe the motion and distribu-tion of a collection of particles (a mass transfer approach) where the particles are considered to be the third species in an electrolyte mixture. The parameter range of interest in the experiments is identified and the results for the particle velocity are compared with the results of a single-particle electrophoresis study. The particle distribution is obtained using the aforementioned mass transfer approach and the results for both the velocity and the particle distribution compare well with the experimental results. Surprisingly, the pres-ence of the walls has little or no effect on the particle velocity. Therefore, a review of the principles and fundamentals of DLVO and non-DLVO surface forces is addressed. A future objective of this work is to develop a unified theory of the motion of a distribution of colloidal particles near charged walls for electroosmotic flow.

Original languageEnglish
Publication statusPublished - 2012 Dec 1
Externally publishedYes
Event50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Nashville, TN, United States
Duration: 2012 Jan 92012 Jan 12

Other

Other50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityNashville, TN
Period12/1/912/1/12

ASJC Scopus subject areas

  • Aerospace Engineering

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  • Cite this

    Conlisk, A. T., Zambrano, H., Li, H., Kazoe, Y., & Yoda, M. (2012). Particle-wall interactions in micro/nanochannels. Paper presented at 50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Nashville, TN, United States.