Effect of electric double layer on near-wall ph in microfluidic device measured by nano-LIF

R. Kuriyama, Y. Tanaka, S. Akiyama, Y. Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The present study experimentally investigated the effect of electric double layer (EDL) on pH in the vicinity of microchannel wall. Nanoscale laser induced fluorescence (nano-LIF) imaging technique was utilized for near-wall pH measurement. The fluorescent dye whose intensity depends on pH value was excited by the evanescent wave and the intensity was converted to pH value via a calibration curve. This technique was first applied to the steady flow field and additionally to the unsteady mixing flow field. The obtained results indicate that the near-wall pH distribution is totally lower than bulk pH due to the EDL.

Original languageEnglish
Title of host publication15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011
Pages215-217
Number of pages3
Publication statusPublished - 2011 Dec 1
Event15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011 - Seattle, WA, United States
Duration: 2011 Oct 22011 Oct 6

Publication series

Name15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011
Volume1

Other

Other15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011
CountryUnited States
CitySeattle, WA
Period11/10/211/10/6

Keywords

  • Electric double layer
  • Electric field
  • Electroosmotic flow
  • Evanescent wave
  • Nano-LIF
  • PH

ASJC Scopus subject areas

  • Control and Systems Engineering

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  • Cite this

    Kuriyama, R., Tanaka, Y., Akiyama, S., & Sato, Y. (2011). Effect of electric double layer on near-wall ph in microfluidic device measured by nano-LIF. In 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011 (pp. 215-217). (15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011; Vol. 1).