Title |
ZnS:Mn nanoparticles functionalized by PAMAM-OH dendrimer based fluorescence ratiometric probe for cadmium
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Published in |
Talanta, November 2014
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DOI | 10.1016/j.talanta.2014.10.010 |
Pubmed ID | |
Authors |
Bruno B. Campos, Manuel Algarra, Ksenija Radotić, Dragosav Mutavdžić, Enrique Rodríguez-Castellón, José Jiménez-Jiménez, Beatriz Alonso, Carmen M. Casado, Joaquim C.G. Esteves da Silva |
Abstract |
We report a nanocomposite of ZnS:Mn quantum dots and a third generation PAMAM-OH dendrimer (ZnS:Mn@PAMAM-OHG=3) which was rationalized to be used as ratiometric nanosensor for Cd(2+) in aqueous solution. The nanoparticles exhibited a bright yellow-orange emission with peaks at 448 and 595nm. The structure of ZnS:Mn was not changed after coupling with PAMAM-OH, which was evidenced by the analysis of the emission spectra of the compounds. The results confirm that the prepared fluorescence nanoparticles could selectively detect Cd(2+) in aqueous solution with a limit of detection of 24.34μM and RSD 4.07%, obtained by using the ratio I448/I595. The method was applied to different water samples. |
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