Layer-by-layer fabrication of an anatase titania multilayer with gradual sponge-like morphology |
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Authors: | Jan Perlich Mine Memesa Alexander Diethert Ezzeldin Metwalli Weinan Wang Stephan V Roth Jochen S Gutmann Peter Müller-Buschbaum |
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Institution: | 1.Lehrstuhl für Funktionelle Materialien, Physik-Department E13,TU München,Garching,Germany;2.HASYLAB-DESY,Hamburg,Germany;3.Max-Planck Institute for Polymer Research,Mainz,Germany;4.Deutsches Textilforschungszentrum Nord-West e.V.,Institut an der Universit?t Duisburg-Essen,Krefeld,Germany |
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Abstract: | The fabrication of a functional multilayer system with a gradually hierarchical order formed by individual titania thin films
of different porosity is investigated. The porous or sponge-like nanostructures are fabricated using a diblock copolymer assisted
sol–gel process. The successive spin-coating of the sol–gel solution onto the silicon substrate deposits a thin polymer nanocomposite
film which is transformed to purely anatase titania nanostructures via calcination. In total, this procedure is repeated layer
by layer for three times. This layer-by-layer approach is monitored with grazing incidence small-angle X-ray scattering (GISAXS)
after each fabrication step. The GISAXS investigation is complemented in real space with a scanning electron microscopy characterization
of the respective preparation stages. From the characterization, a porous titania multilayer system with gradually structured
levels is clearly identified. |
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