Layer-by-layer fabrication of an anatase titania multilayer with gradual sponge-like morphology

作者：Perlich Jan^*; Memesa Mine; Diethert Alexander; Metwalli Ezzeldin; Wang Weinan; Roth Stephan V; Gutmann Jochen S; Mueller Buschbaum Peter

来源：Colloid and Polymer Science, 2012, 290(2): 119-126.

DOI：10.1007/s00396-011-2529-2

• Sol-gel
• Anatase titania
• Thin film
• Gradual multilayer
• GISAXS

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.

• 出版日期2012-1