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  • quantum dots  (1)
  • thin films  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Low Temperature Sol-Gel Preparation of β-Al2TiO5 Thin Films: Spectroscopic Analysis of the Precursors (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 577-580 
    Details
    ISSN: 1573-4846
    Keywords: aluminum titanate ; NMR ; MS ; thin films ; precursor chemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Two sol-gel syntheses allowed the preparation of β-Al2TiO5 thin films on silicon substrates at 700°C, reacting aluminum and titanium alkoxides with and without acetylacetone as a chelating agent. Nuclear magnetic resonance (NMR) and mass spectra of the sols allowed identification of the intermediate species formed and to show the formation of an Al-Ti containing polymer establishing that the synthesis without acetylacetone leads to the most extensive polymerization. The formation of β-Al2TiO5 at low temperatures is attributed to diffusion-limited crystallization process, which takes place in the conditions of high homogeneity at molecular level reached in the sol-gel synthesis. The crystallization of the films was studied as a function of the firing time and temperature and confirmed that β-Al2TiO5 with better thermal stability was obtained with the synthesis without chelating agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008705109815
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  • 2
    Electronic Resource
    Electronic Resource
    Materials for Photonic Applications From Sol-Gel* (2000)
    Springer
    Journal of electroceramics 4 (2000), S. 151-165 
    Details
    ISSN: 1573-8663
    Keywords: sol-gel ; integrated optics ; waveguides ; quantum dots ; fullerene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A review of sol-gel materials developed in our laboratory for photonic applications is presented. These materials include planar and strip waveguides for integrated optics (IO) passive devices, Er doped waveguides for IO amplifiers, films doped with semiconductor quantum dots for optical switching and fullerene doped materials for optical limiting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009981510609
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