Application of Luminescent BSA-capped CdS Quantum Dots as a Fluorescence Probe for the Detection of Cu~(2+)

摘要

CdS Quantum dots(QDs)are synthesized in aqueous solution with bovine serum albumin(BSA)as the stabilizing agents using a stepwise procedure at room temperature.They can be used as a new fluorescence probe in the determination of Cu~(2+),which is proved to be a simple,rapid and specific method.Approximate concentrations of other physiologically important cations,such as Zn~(2+),K~+etc,have no effect on the fluorescence.Under the optimum condition,the response is linear to the concentration of Cu~(2+)in the range of 0-80.0 umol/L,and the detection limit is 50.0 nmol/L.This method is used to the determination of Cu~(2+)in human hair,the recovery is 98-104%.And the possible detection mechanism is also discussed.