Surface characterization of GSH-CdTe quantum dots

J. L. Gautier, J. P. Monrás, I. O. Osorio-Román, C. C. Vásquez, D. Bravo, T. Herranz, J. F. Marco, J. M. Pérez-Donoso

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

13 Citas (Scopus)

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 originalInglés
Páginas (desde-hasta)113-118
Número de páginas6
PublicaciónMaterials Chemistry and Physics
Volumen140
N.º1
DOI
EstadoPublicada - 15 jun 2013

Áreas temáticas de ASJC Scopus

  • Ciencia de los materiales (todo)
  • Física de la materia condensada

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