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|title: ||The synthesis of SiO2@CdS nanocomposites using single-molecule precursors|
|authors: ||Monteiro, Olinda C.|
Esteves, Ana Catarina C.
|issue date: ||Jun-2002|
|publisher: ||American Chemical Society|
|abstract: ||A chemical method for preparing cadmium sulfide nanocrystals over silica surfaces is
reported. This is a one-step synthetic method involving the chemical degradation of
alkyldithiocarbamato complexes of cadmium in the presence of submicrometric SiO2 particles.
The X-ray powder diffraction patterns of the SiO2@CdS nanocomposites show diffraction
peaks consistent with the presence of hexagonal CdS. Visible spectroscopy and scanning
and transmission electron microscopy indicate that an inorganic composite formed by islands
of CdS nanocrystals at the SiO2 surfaces. The SiO2@CdS nanocomposites can, in turn, be
capped with a protective layer of SiO2 using the Sto¨ber method.|
|source: ||Chemistry of Materials|
|appears in collections||DQ - Artigos|
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