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http://dx.doi.org/10.3795/KSME-B.2011.35.4.385

Simple Fabrication of Micromixer Based on Non-Equilibrium Electrokinetics in Micro/Nano Hybrid Fluidic System  

Yu, Samuel (Dept. of Mechanical Engineering, Inha Univ.)
Kim, Sun-Min (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.35, no.4, 2011 , pp. 385-390 More about this Journal
Abstract
In this study, we developed a micromixer based on the non-equilibrium electrokinetics at the junction of a microchannel and nanochannel. Two fluid streams were mixed by an electro-osmotic flow and a vortex flow created as a result of the non-equilibrium electrokinetics at the junction of the microchannel and nanochannel. Initially, the microchannel was fabricated using Polydimethylsiloxane (PDMS) by the general soft lithography process and the nanochannel was created at a specific position on the microchannel by applying a high voltage. To evaluate the mixing performance of the micromixer, fluorescent distribution was analyzed by using the fluorescent dye, Rhodamine B. About 90% mixing was achieved with this novel micromixer, and this micromixer can be used in microsystems for biochemical sample analysis.
Keywords
Non-Equilibrium Electrokinetics; Micromixer; Electrical Breakdown; Electroosmosis; Polydimethylsiloxane (PDMS); Micro/Nano Fluidic System;
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