Preparation of multifunctional coating materials and their applications: Dissertation

Terho Kololuoma

    Research output: ThesisDissertationCollection of Articles


    Sol-gel technique has been utilized for the fabrication of multifunctional inor-ganic-organic hybrid materials for specific applications. Synthesized methacrylic acid and benzoylacetone modified tin alkoxide precursors were used for the first time for the realization of directly UV-photopatternable antimony-doped tin dioxide coatings. These single-layered coatings have transmission values over 80 % at visible wavelengths and maximum electrical conductivity values around 15 S/cm. In comparison, multi-layered coatings without UV-photopatternability properties were fabricated. In this case, electrical conductivities are in the range of 102 S/cm. A novel material technique approach for laser protective eyewear was utilized for the synthesis and preparation of the mechanically tolerant and near-infrared absorbing filter coatings. Optical densities from 2 to 4 at laser threat wavelength, a ten fold increase in scratch resistance, and a hundred-fold increase in abrasion resistance, compared to uncoated polycarbonate substrates, were obtained by using absorbing dye-molecule doped sol-gel materials. Fabrication of a diffractive optical element, namely axicon, using hybrid-glass materials was demonstrated for the first time. Hybrid-glass material was tailored to fulfill the requirements of the functional axicon element.
    Original languageEnglish
    QualificationDoctor Degree
    Awarding Institution
    • University of Oulu
    • Laitinen, R., Supervisor, External person
    • Kopola, Harri, Supervisor
    Award date5 Sept 2003
    Place of PublicationEspoo
    Print ISBNs951-38-6227-5
    Electronic ISBNs951-38-6228-3
    Publication statusPublished - 2003
    MoE publication typeG5 Doctoral dissertation (article)


    • sol-gel materials
    • antimony-doped tin dioxide
    • micro-optical elements
    • protective coatings


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