Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7147176 | Sensors and Actuators B: Chemical | 2014 | 9 Pages |
Abstract
Bovine serum albumin conjugated zinc oxide nanoparticles (BSA-ZnO) were used as selective copper ions probes by fluorescence spectroscopic technique. The results showed that the fluorescence of the BSA-ZnO nanoparticles could be quenched only by Cu2+ in physiological buffer solution. The optimum fluorescence intensity was found to be at pH 7.0 with a temperature of 25 °C. Under these optimum conditions, the detection limit of Cu2+ ions was 6.09 Ã 10â7 mol Lâ1. The effect of foreign ions on the fluorescence intensity of BSA-ZnO nanoparticles was also studied and foreign ions showed low interference response in detecting of Cu2+ ions. Moreover, the quenching was discussed to be a static quenching procedure, which was proved by quenching rate constant Kq (6.98 Ã 1012 L molâ1 sâ1).
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Authors
Zhi Chen, Dudu Wu,