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  • Chitosan-silane sol-gel hybrid thin films with controllable layer thickness and morphology
    Spirk, Stefan ...
    The preparation of thin films of chitosan-silane hybrid materials by combining sol-gel processing and spin coating is reported. A variety of silanes can be used as starting materials for the ... preparation of such thin films, namely tetraethoxysilane, tri-tert-butoxysilanol, trimethylethoxysilane, p-trifluoromethyltetra-fluorophenyltriethoxysilane, trivinylmethoxysilane, (methoxymethyl)trimethyl-silane, and hexamethoxydisilane. These silanes are subjected to a sol-gel process before they are added to acidic chitosan solutions. The chitosan:silane ratio is kept constant at 6:1 (w/w) and dilutions with ethanol are prepared and spin coated. Depending on the degree of dilution, film thickness can be controlled in a range between 5-70 nm. For the determination of additional surface properties, static water contact angle measurements and atomic force microscopy have been employed.
    Type of material - conference contribution
    Publish date - 2013
    Language - english
    COBISS.SI-ID - 15971606
    DOI