Formation of ionic depletion/enrichment zones in a hybrid micro-/ nano-channel

Kuan Da Huang; Ruey Jen Yang

doi:10.1007/s10404-008-0281-9

Formation of ionic depletion/enrichment zones in a hybrid micro-/ nano-channel

Kuan Da Huang, Ruey Jen Yang

Department of Engineering Science

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

This study fabricates a cross-form microchip in which the two side channels are attached to the main channel via a nanochannel bridge. Ionic depletion and enrichment zones are established on the anodic and cathodic sides of the nanochannel. Results show that the low conductivity within the depletion zone induces a rapid electroosmotic flow, which in turn prompts the generation of vortex flow structures within the depletion zone. Both the lengthening of the depletion bulk charge layer and decrease in length of the diffusion layer as the applied voltage is increased are also demonstrated in this study.

Original language	English
Pages (from-to)	631-638
Number of pages	8
Journal	Microfluidics and Nanofluidics
Volume	5
Issue number	5
DOIs	https://doi.org/10.1007/s10404-008-0281-9
Publication status	Published - 2008

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Materials Chemistry

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10.1007/s10404-008-0281-9

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abstract = "This study fabricates a cross-form microchip in which the two side channels are attached to the main channel via a nanochannel bridge. Ionic depletion and enrichment zones are established on the anodic and cathodic sides of the nanochannel. Results show that the low conductivity within the depletion zone induces a rapid electroosmotic flow, which in turn prompts the generation of vortex flow structures within the depletion zone. Both the lengthening of the depletion bulk charge layer and decrease in length of the diffusion layer as the applied voltage is increased are also demonstrated in this study.",

author = "Huang, {Kuan Da} and Yang, {Ruey Jen}",

note = "Funding Information: Acknowledgments The authors gratefully acknowledge the financial support provided to this study by the National Science Council of Taiwan under Grant no. NSC-96-2628-E-006-162-MY3.",

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AU - Huang, Kuan Da

AU - Yang, Ruey Jen

N1 - Funding Information: Acknowledgments The authors gratefully acknowledge the financial support provided to this study by the National Science Council of Taiwan under Grant no. NSC-96-2628-E-006-162-MY3.

PY - 2008

Y1 - 2008

N2 - This study fabricates a cross-form microchip in which the two side channels are attached to the main channel via a nanochannel bridge. Ionic depletion and enrichment zones are established on the anodic and cathodic sides of the nanochannel. Results show that the low conductivity within the depletion zone induces a rapid electroosmotic flow, which in turn prompts the generation of vortex flow structures within the depletion zone. Both the lengthening of the depletion bulk charge layer and decrease in length of the diffusion layer as the applied voltage is increased are also demonstrated in this study.

AB - This study fabricates a cross-form microchip in which the two side channels are attached to the main channel via a nanochannel bridge. Ionic depletion and enrichment zones are established on the anodic and cathodic sides of the nanochannel. Results show that the low conductivity within the depletion zone induces a rapid electroosmotic flow, which in turn prompts the generation of vortex flow structures within the depletion zone. Both the lengthening of the depletion bulk charge layer and decrease in length of the diffusion layer as the applied voltage is increased are also demonstrated in this study.

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Formation of ionic depletion/enrichment zones in a hybrid micro-/ nano-channel

Abstract

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