Investigation and application of size-dependent properties of silicon-based nanoparticles produced by laser pyrolysis

E. Trave, F. Enrichi, G. Mattei, V. Bello, E. Borsella, F. Fabbri, M. Carpanese, M. Falconieri, C. Abate, F. Costa, L. Costa, L. Gini

Research output: Contribution to conferencePaper


The synthesis of silicon nanocrystals (Si-NC) has attracted a great deal of interest due to their size-dependent optical properties. The appearance of a strong visible photoluminescence (PL) even at room temperature makes this kind of material very interesting for applications in optoelectronics and photonics. In this work, we report on the possibility to control the optical properties of silicon nanostructures by fine tuning of both preparation and processing parameters. Large amount of Si-based nano-powders were prepared by cw CO2laser pyrolysis of gas-phase precursors followed by annealing at different temperatures, in controlled atmosphere. After the heat treatment, the structural and optical analyses revealed the presence of size-controlled optical properties, characterized by the typical Si-NC red-IR emission with lifetime ranging from a hundred of μs to some ms. Next step was the nano-powder dispersion by several methodologies and their incorporation into a silica sol-gel matrix. The realization of a glassy material that preserves the powder luminescence opens the way to a wide range of applications. To this purpose we focused our attention on the study of the influence of the sol-gel processing steps on the optical properties of Si-nano-powders. Moreover, a study of 1.54 micron Er emission sensitizing effect from Si-based nanostructures in sol-gel glasses was performed and is presented here.
Original languageEnglish
Publication statusPublished - 2005
Externally publishedYes
EventAdvanced Laser Technologies 2004 - , Italy
Duration: 1 Jan 2005 → …


ConferenceAdvanced Laser Technologies 2004
Period1/1/05 → …


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Trave, E., Enrichi, F., Mattei, G., Bello, V., Borsella, E., Fabbri, F., ... Gini, L. (2005). Investigation and application of size-dependent properties of silicon-based nanoparticles produced by laser pyrolysis. Paper presented at Advanced Laser Technologies 2004, Italy.