Formation of hybrid nano-crystals in organic–inorganic films from a basic sol

  • Cristiana Figus
  • Masahide Takahashi
  • Tongjit Kidchob
  • Toshinobu Yoko
  • Massimo Piccinini
  • Maria Casula
  • Plinio Innocenzi
Original Paper


Organic–inorganic films containing hybrid nanocrystals have been prepared by sol–gel processing in controlled conditions. We have systematically changed the temperature and the aging time of a precursor sol containing an organically modified alkoxide bearing an epoxy group, 3-glycidoxypropyltrimethoxysilane, to obtain a controlled crystallization of hybrid layered structures in hybrid films. The precursor sol has been aged at different temperatures, from 5 to 60 °C, and for 1, 2 or 3 days; the films have been deposited from the aged sol and immediately after characterized by X-ray diffraction, Fourier transform infrared spectroscopy and Raman spectroscopy. We have observed that the formation of the hybrid crystals can be obtained only when at least 50% of the epoxies are opened and a larger silica condensation is achieved. These conditions are reached after aging at 60 °C for 1 day, or at longer aging times when the sol is aged at lower temperatures. Transmission electron microscopy and optical polarized images have confirmed the formation of the hybrid crystals.


Sol–gel Organic–inorganic hybrid Film Hybrid crystals 


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Cristiana Figus
    • 1
    • 2
  • Masahide Takahashi
    • 1
    • 2
  • Tongjit Kidchob
    • 2
  • Toshinobu Yoko
    • 1
  • Massimo Piccinini
    • 3
  • Maria Casula
    • 4
  • Plinio Innocenzi
    • 2
  1. 1.Institute for Chemical ResearchKyoto UniversityKyotoJapan
  2. 2.D.A.P., Laboratorio di Scienza dei Materiali e NanotecnologieUniversità di Sassari and CR-INSTMAlghero (Sassari)Italy
  3. 3.Porto Conte Ricerche, Laboratorio ImagingAlghero (SS)Italy
  4. 4.Dipartimento di Scienze ChimicheUniversità di CagliariMonserrato (Cagliari)Italy

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