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

R. Kuriyama, Y. Tanaka, S. Akiyama, Yohei 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
Volume1
Publication statusPublished - 2011
Event15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011 - Seattle, WA, United States
Duration: 2011 Oct 22011 Oct 6

Other

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

Fingerprint

Microfluidics
Flow fields
Fluorescence
Lasers
Steady flow
Microchannels
Dyes
Calibration
Imaging techniques

Keywords

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

ASJC Scopus subject areas

  • Control and Systems Engineering

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 (Vol. 1, pp. 215-217)

Effect of electric double layer on near-wall ph in microfluidic device measured by nano-LIF. / Kuriyama, R.; Tanaka, Y.; Akiyama, S.; Sato, Yohei.

15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011. Vol. 1 2011. p. 215-217.

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

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. vol. 1, pp. 215-217, 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011, Seattle, WA, United States, 11/10/2.
Kuriyama R, Tanaka Y, Akiyama S, Sato Y. 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. Vol. 1. 2011. p. 215-217
Kuriyama, R. ; Tanaka, Y. ; Akiyama, S. ; Sato, Yohei. / Effect of electric double layer on near-wall ph in microfluidic device measured by nano-LIF. 15th International Conference on Miniaturized Systems for Chemistry and Life Sciences 2011, MicroTAS 2011. Vol. 1 2011. pp. 215-217
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