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We report a novel real-time method to monitor the reaction of an organic dye, 5(6)-carboxynaphthofluorescein succinimidyl ester and a CdSe/ZnS quantum dot (QD) using fluorescence spectra of microdroplets formed in a microfluidic device. Dual fluorescence peaks (at λ=605 and 670nm) were observed via a fluorescence energy transfer (FRET) process from the CdSe/ZnS QD to the organic dye; the rate of the...
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