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Fluid Flow in Nanometer Scale Channels: Effects of Polymer Coating

[+] Author Affiliations
R. Qiao, P. He

Clemson University

Paper No. IMECE2006-14169, pp. 587-590; 4 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Microelectromechanical Systems
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Microelectromechanical Systems Division
  • ISBN: 0-7918-4775-6 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


Electroosmotic flow is one of the most important fluid transport mechanism in nanofluidic systems due to its ease-of-control and excellent scaling behavior. In this paper, we report on the atomistic simulation of electroosmotic flow regulation by coating the channel surface with a thin layer of polymers. While such coating is applied routinely in practice, the fundamental mechanism of the flow control is not well-understood. We show that the flow depends both on the polymer type and coating density. A detailed analysis of these results indicates that the flow regulation has both a hydrodynamic origin and a physio-chemical origin. The results highlight the need to integrate physical chemistry into the fluid mechanics for a fundamental understanding of the fluid transport at nanoscale.

Copyright © 2006 by ASME



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