Si nanocrystals obtained through polymer pyrolysis
2003; American Institute of Physics; Volume: 83; Issue: 4 Linguagem: Inglês
10.1063/1.1587876
ISSN1520-8842
AutoresGian Domenico Sorarù, Stefano Modena, Paolo Bettotti, Gobind Das, G. Mariotto, Lorenzo Pavesi,
Tópico(s)Nanowire Synthesis and Applications
ResumoIn this letter, we report the formation of bulk samples of silica-based glass containing Si nanocrystals (Si-ncs) by pyrolysis of a preceramic precursor. The starting precursor is a sol–gel-derived polysiloxane containing only Si–H groups which leads, after annealing in a controlled atmosphere in the range 1000–1200 °C, to the precipitation of Si-ncs. Characterization of the nanostructure was performed by x-ray diffraction and Raman scattering analyses. Room-temperature luminescence experiments show the interesting optical properties of the Si-ncs/SiO2 material.
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