Toward microscale flow control using non-uniform electro-osmotic flow

Federico Paratore, Evgeniy Boiko, Amir Gat, Govind V. Kaigala, Moran Bercovici

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We present a novel method that allows establishing desired flow patterns in a Hele-Shaw cell, solely by controlling the surface chemistry, without the use of physical walls. Using weak electrolytes, we locally pattern the chamber's ceiling and/or floor, thus defining a spatial distribution of surface charge. This translates to a non-uniform electric double layer which when subjected to an external electric field applied along the chamber, gives rise to non-uniform electroosmotic flow (EOF). We present the theory that allows prediction and design of such flows fields, as well as experimental demonstrations opening the door to configurable microfluidic devices.

Original languageEnglish
Title of host publicationMicrofluidics, BioMEMS, and Medical Microsystems XVI
EditorsHolger Becker, Bonnie L. Gray
ISBN (Electronic)9781510614673
DOIs
StatePublished - 2018
EventMicrofluidics, BioMEMS, and Medical Microsystems XVI 2018 - San Francisco, United States
Duration: 27 Jan 201829 Jan 2018

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume10491

Conference

ConferenceMicrofluidics, BioMEMS, and Medical Microsystems XVI 2018
Country/TerritoryUnited States
CitySan Francisco
Period27/01/1829/01/18

Keywords

  • Electro-osmotic flow
  • Hele-Shaw cell
  • Microfluidic probe
  • Surface patterning
  • Zeta potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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