ELECTROKINETICALLY DRIVEN MICROFLUIDICS AND NANOFLUIDICS PDF

Compare all 2 sellers About This Item We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. See our disclaimer This book provides a fundamental understanding of the mechanisms governing both DC and AC electrokinetic phenomena. Electrokinetics is currently the mechanism of choice for fluid actuation and bioparticle manipulation at microscale and nanoscale dimensions. There has recently been widespread interest in the use of AC electric fields, given the many advantages it offers over DC electrokinetics. Nevertheless, a fundamental understanding of the governing mechanisms underlying the complex and nonlinear physicochemical hydrodynamics associated with these systems is required before practical microfluidic and nanofluidic devices can be engineered.

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Get e-Alerts Abstract Electroosmotic flow in microfluidic systems is limited to the low Reynolds number regime. As a result species mixing in electroosmotic flow systems is inherently diffusion dominated, requiring both a long mixing channel and retention time to attain a homogeneous solution.

Recent studies have shown that the introduction of oppositely charged surface heterogeneities to microchannel walls can result in regions of localized flow circulation within the bulk flow.

In this study we seek to investigate these circulation regions, through 3D finite-element based numerical simulations, and then use them as a method of enhancing species mixing in a T-shaped micromixer.

While all cases of surface heterogeneity are shown to enhance mixing efficiency, greater improvement is found when both the size of the heterogeneous region and the degree of heterogeneity i. Cited By This article is cited by publications. DOI: Langmuir , 27 8 , Kang,, C. Yang, and, X. Langmuir , 21 16 , Fuzhi Tian and, Daniel Y. Langmuir , 21 6 , Langmuir , 21 3 , Analytical Chemistry , 76 24 , Analytical Chemistry , 76 18 , Analytical Chemistry , 76 11 , Tang,, C.

Yang,, C. Chai, and, H. Langmuir , 19 26 , Analytical Chemistry , 75 21 , Electrokinetic Transport through Rough Microchannels. David Erickson and, Dongqing Li. The Journal of Physical Chemistry B , 44 , Abraham D. Stroock and, George M. Accounts of Chemical Research , 36 8 , Langmuir , 19 13 , Analytical Chemistry , 75 8 , Baoming Li and, Daniel Y. Langmuir , 19 7 , Gi Hun Seong and, Richard M. Journal of the American Chemical Society , 45 , Langmuir , 18 23 , Control of solutal Marangoni-driven vortical flows and enhancement of mixing efficiency.

Journal of Colloid and Interface Science , , Subrata Bera, Somnath Bhattacharyya. Aminul Islam Khan, Prashanta Dutta. Micromachines , 10 8 , Time and length scales in governing equations and boundary conditions for on-chip electrophoretic sample separation.

A numerical investigation of magnetic mixing in electroosmotic flows. Journal of Electrostatics , , Banerjee, A. Influence of varying zeta potential on non-Newtonian flow mixing in a wavy patterned microchannel.

Journal of Non-Newtonian Fluid Mechanics , , Nayak, B. Enhanced mixing and flow reversal in a modulated microchannel. International Journal of Mechanical Sciences , , Vortex generation in electroosmotic flow in a straight polydimethylsiloxane microchannel with different polybrene modified-to-unmodified section length ratios. Microfluidics and Nanofluidics , 23 2 DOI: Diffusion and mixing in microfluidic devices. Nayak, A. Haque, B. Induced mixing electrokinetics in a charged corrugated nano-channel: towards a controlled ionic transport.

Microfluidics and Nanofluidics , 22 10 DOI: Naren Bag, S. Electroosmotic flow of a non-Newtonian fluid in a microchannel with heterogeneous surface potential. Numerical simulation for electro-osmotic mixing under three types of periodic potentials in a T-shaped micro-mixer.

Chemical Engineering and Processing - Process Intensification , , A review on the application, simulation, and experiment of the electrokinetic mixers. Banerjee, B. Mixing and charge transfer in a nanofluidic system due to a patterned surface. Applied Mathematical Modelling ,

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Electro-osmosis

Applications[ edit ] Electro-osmotic flow is commonly used in microfluidic devices, [8] [9] soil analysis and processing, [10] and chemical analysis, [11] all of which routinely involve systems with highly charged surfaces, often of oxides. One example is capillary electrophoresis , [9] [11] in which electric fields are used to separate chemicals according to their electrophoretic mobility by applying an electric field to a narrow capillary, usually made of silica. In electrophoretic separations, the electroosmotic flow affects the elution time of the analytes. Electro-osmotic flow is actuated in a FlowFET to electronically control fluid flow through a junction. It is projected that micro fluidic devices utilizing electroosmotic flow will have applications in medical research.

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Get e-Alerts Abstract Electroosmotic flow in microfluidic systems is limited to the low Reynolds number regime. As a result species mixing in electroosmotic flow systems is inherently diffusion dominated, requiring both a long mixing channel and retention time to attain a homogeneous solution. Recent studies have shown that the introduction of oppositely charged surface heterogeneities to microchannel walls can result in regions of localized flow circulation within the bulk flow. In this study we seek to investigate these circulation regions, through 3D finite-element based numerical simulations, and then use them as a method of enhancing species mixing in a T-shaped micromixer. While all cases of surface heterogeneity are shown to enhance mixing efficiency, greater improvement is found when both the size of the heterogeneous region and the degree of heterogeneity i.

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