Control of electro-osmostic flow by light

László Oroszi, A. Dér, Huba Kirei, P. Ormos, Vilmos Rakovics

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The author introduce a technique for the optical control of electro-osmosis. One wall of the microfluidic channel is formed by a photoconductive material. Illumination of the photoconductor results in a local drop of the electric field in the microchannel, reducing the electro-osmotic driving force. Fluid flow can be effectively modulated by light utilizing this effect. They verified the phenomenon in linear channels and further developed the method by building a Y junction, an optically controlled microfluidic switch. This unit is the basis of more complex flow patterns: it demonstrates the feasibility of dynamic optical control of microfluidic devices.

Original languageEnglish
Article number263508
JournalApplied Physics Letters
Volume89
Issue number26
DOIs
Publication statusPublished - 2006

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optical control
photoconductors
osmosis
microfluidic devices
microchannels
fluid flow
flow distribution
switches
illumination
electric fields

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Control of electro-osmostic flow by light. / Oroszi, László; Dér, A.; Kirei, Huba; Ormos, P.; Rakovics, Vilmos.

In: Applied Physics Letters, Vol. 89, No. 26, 263508, 2006.

Research output: Contribution to journalArticle

Oroszi, László ; Dér, A. ; Kirei, Huba ; Ormos, P. ; Rakovics, Vilmos. / Control of electro-osmostic flow by light. In: Applied Physics Letters. 2006 ; Vol. 89, No. 26.
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