Nano Science and Technology Institute
Nanotech 2005 Vol. 1
Nanotech 2005 Vol. 1
Technical Proceedings of the 2005 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 10: Micro and Nano Fluidics Design and Phenomena

Scaling of Electroosmotic Flow and Ionic Conductivity in Nanochannels

Authors:R. Qiao and N.R. Aluru
Affilation:Beckman Institute for Advanced Science and Technology, US
Pages:589 - 592
Keywords:electrokinetic transport, electroosmotic flow, ionic conductivity, nanochannel, scaling
Abstract:Electrokinetic transport is widely encountered in many nanofluidic systems, and understanding its scaling as a function of various operating conditions, e.g., bulk concentration, is important for establishing design rules and for exploring the design space. Here we report, for first time, the scaling study of the electroosmotic flow and ionic conductivity in slit nano-channels using molecular dynamics (MD) and continuum simulations. The simulation results indicated that the scaling of electroosmotic flow and ionic conductivity in nanometer channels is influenced strongly by the molecular nature of ions and discreteness of water molecules and can not be predicted accurately by the continuum theory. The scaling behavior observed in the MD simulations could provide useful guidelines for the design of electrokinetic transport-based nanofluidic devices.
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