Luminescence Properties of Silicon Nanocrystals
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ABSTRACT Weblike aggregates of coalesced Si nanocrystals are produced by a laser vaporization controlled condensation technique. SEM micrographs show particles with - 10 nm diameters but the Raman shift suggests the presence of particles as small as - 4 nm. FTIR of the freshly prepared particles shows weak peaks due to the stretching, bending and rocking vibrations of the Si-O-Si bonds indicating the presence of a surface oxidized layer SiOx (x
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