Determination of zinc in aqueous solution using CdSe/ZnS quantum dots functionalised with [carboxymethyl-(4-mercapto-phenyl)-amino]-acetate
by John F. Callan, Bridgeen McCaughan, Ray C. Mulrooney, Sukanta Kamila
International Journal of Biomedical Nanoscience and Nanotechnology (IJBNN), Vol. 2, No. 1, 2011

Abstract: CdSe/ZnS quantum dots functionalised with [Carboxymethyl-(4-mercapto-phenyl)-amino]-acetate displayed selectivity for Zn₂₊ ion when tested against a range of other commonly available metal ions in buffered aqueous solution (pH 7.0 ± 0.1). The probe displayed an enhancement in its fluorescence intensity upon addition of Zn₂₊ attributed to a cancellation of a photoinduced electron transfer process from the bound receptor to the excited quantum dot that otherwise led to non-radiative decay. Good linearity was established for Zn₂₊ in the 0.2 to 5.0 mM range.

Online publication date: Tue, 30-Sep-2014

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