Resumen
The surface characterization of CdTe QDs synthesized by a novel procedure using glutathione (GSH), low temperatures (60-90 °C) and K 2TeO3 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 S-2 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.
Idioma original | Inglés |
---|---|
Páginas (desde-hasta) | 113-118 |
Número de páginas | 6 |
Publicación | Materials Chemistry and Physics |
Volumen | 140 |
N.º | 1 |
DOI | |
Estado | Publicada - 15 jun. 2013 |
Áreas temáticas de ASJC Scopus
- Ciencia de los Materiales General
- Física de la materia condensada