Preparation and Characterisation of Nanocomposites for Optical Applications: Laser-Synthesized Si-Nanocrystals Embedded in Dielectric Hosts by Sol-Gel-Processing

  1. Prof. Dr. M. Rühle8 and
  2. Prof. Dr. H. Gleiter9
  1. E. Borsella1,2,
  2. S. Botti3,
  3. S. Martelli3,
  4. M. Falconieri4,
  5. L. Costa5,
  6. F. Bignoli5,
  7. S. Grandi5,
  8. Luigi Sangaletti6,
  9. L. Depero7 and
  10. B. Allieri7

Published Online: 23 DEC 2005

DOI: 10.1002/352760622X.ch48

Interface Controlled Materials, Volume 9

Interface Controlled Materials, Volume 9

How to Cite

Borsella, E., Botti, S., Martelli, S., Falconieri, M., Costa, L., Bignoli, F., Grandi, S., Sangaletti, L., Depero, L. and Allieri, B. (2000) Preparation and Characterisation of Nanocomposites for Optical Applications: Laser-Synthesized Si-Nanocrystals Embedded in Dielectric Hosts by Sol-Gel-Processing, in Interface Controlled Materials, Volume 9 (eds M. Rühle and H. Gleiter), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/352760622X.ch48

Editor Information

  1. 8

    Max-Planck-Institut für Metallforschung, Seestraße 92, 70174 Stuttgart, Germany

  2. 9

    Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany

Author Information

  1. 1

    Unita' INFM di Padova, Dip. di Fisica dell'Universita', Padova, Italy

  2. 2

    Consorzio Padova Ricerche, Padova, Italy

  3. 3

    ENEA, Sez. INN/FIS/SPET, Frascati, Rome, Italy

  4. 4

    ENEA, Div. INN/NUMA, Rome, Italy

  5. 5

    G.D.E. S.r.l., Novara, Italy

  6. 6

    Istituto Nazionale per la Fisica della Materia (INFM) and Dip. di Matematica e Fisica, Universit' Cattolica del Sacro Cuore, Brescia, Italy

  7. 7

    Unita' INFM di Brescia, Dip. di Ingegneria Meccanica dell' Universita' di Brescia, Brescia, Italy

Publication History

  1. Published Online: 23 DEC 2005
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301911

Online ISBN: 9783527606221

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Keywords:

  • interface controlled materials;
  • nanocomposites for optical applications;
  • preparation;
  • characterisation;
  • laser synthesized Si-nanocrystals;
  • sol-gel processing

Summary

The potential applications for optical and optoelectronic devices of nanosized semiconductors confined in a dielectric material are well recognized in current scientific literature (1–5). In particular, composite materials formed by Si-based nanocrystals embedded in dielectric hosts are promising candidates for the fabrication of non-linear optical devices, but their development is still at an early stage. Here, we report results on nanocomposites (aerogels) obtained integrating laser synthesised Si-nanoparticles into a continuous silica phase by sol-gel processing. After annealing at different temperatures (300–500 °C), the produced materials were characterised by Raman scattering measurements and the sample homogeneity was checked by micro-Raman mapping. TEM analysis of the nanocomposites pointed out at the presence of agglomerated nanoparticles (100–200 nm average size) as confirmed by Dynamic Light Scattering (DLS) measurements on colloids prepared by dispersion of the as-produced powders in methanol. Preliminary results will be presented on the linear (visible luminescence) and non-linear (z-scan) optical characterisation of the samples.