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Publication Citation: Effect of Caged Fluorescent Dye on the Electroosmotic Mobility in Microchannels

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Author(s): David J. Ross; Laurie E. Locascio;
Title: Effect of Caged Fluorescent Dye on the Electroosmotic Mobility in Microchannels
Published: March 01, 2003
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
Pages: pp. 1218 - 1220
Keywords: electroosmosis;microfluidics
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