Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1522828 | Materials Chemistry and Physics | 2013 | 6 Pages |
Abstract
The surface characterization of CdTe QDs synthesized by a novel procedure using glutathione (GSH), low temperatures (60-90 °C) and K2TeO3 as the -Te precursor is reported. Fluorescence of the produced QDs is stable in the pH range 6-13 and QDs inside eukaryotic cells are highly fluorescent. The surface composition of GSH-CdTe QDs with different spectroscopic properties and particle size distributions was determined by XPS. The XPS analysis indicated that the QDs are essentially CdTe, although all nanoparticles contain 12-24% of CdO (and in one case also TeO2). GSH decomposes with reaction time releasing small amounts of Sâ2 ions that react with Cd(Te) to yield Cd(Te)S in a smaller amount than that of CdTe. Finally, the use of QDs in fluorescence mediated immunodetection of bacterial pathogens has been evaluated.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
J.L. Gautier, J.P. Monrás, I.O. Osorio-Román, C.C. Vásquez, D. Bravo, T. Herranz, J.F. Marco, J.M. Pérez-Donoso,