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

Kuan Da Huang, Ruey Jen Yang

Research output: Contribution to journalArticle

35 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 languageEnglish
Pages (from-to)631-638
Number of pages8
JournalMicrofluidics and Nanofluidics
Volume5
Issue number5
DOIs
Publication statusPublished - 2008 Mar 27

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

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