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Effect of Caged Fluorescent Dye on the Electroosmotic Mobility in Microchannels

Published

Author(s)

David J. Ross, Laurie E. Locascio

Abstract

We report on measurements of electroosmotic mobility in polymer microchannels and silica capillaries with and without the addition of a caged fluorescein dye to the buffer. For PMMA microchannels, the mobility was found to increase from (2.6 0.1) 10-4 cm2/V/s to (4.6 0.1) 10-4 cm2/V/s upon addition of 1.2 mmol/L of caged dye. For PC microchannels, the mobility increased from (4.3 0.2) 10-4 cm2/V/s to (5.4 0.1) 10-4 cm2/V/s upon addition of caged dye. For PDMS microchannels, the mobility increased from (4.3 0.2) 10-4 cm2/V/s to (6.4 0.5) 10-4 cm2/V/s upon addition of caged dye. For fused silica capillaries, the mobility ((5.5 0.2) 10-4 cm2/V/s) was unaffected by the addition of the caged dye.
Citation
Analytical Chemistry
Volume
75
Issue
No. 5

Keywords

electroosmosis, microfluidics

Citation

Ross, D. and Locascio, L. (2003), Effect of Caged Fluorescent Dye on the Electroosmotic Mobility in Microchannels, Analytical Chemistry (Accessed February 25, 2024)
Created March 1, 2003, Updated February 17, 2017