title: Combining mixed titania morphologies into a complex assembly thin film by iterative block-copolymer-based sol–gel templating.
abstract: Sol–gel templating combined with iterative spin-coating steps are used to custom-tailor hierarchically structured titania thin films. Using poly(styrene-block-ethylene oxide) P(S-b-PEO) as the structure directing agent, a foam-like structure is combined with nanogranules. Both structural elements are merged into a complex assembly in thin film geometry. The resulting morphology is pictured by SEM and probed with GISAXS. The installed mesoporous titania sandwich structure exhibits holes with a size of 45 nm which makes it promising for applications in photovoltaics or photocatalysis. An optical characterization completes the structural investigation.
authors.affiliation: Lehrstuhl für Funktionelle Materialien, Physik-Department, TU München, James-Franck-Straße 1, D-85748 Garching, Germany.
authors.forename: M A
authors.initials: MA
authors.lastname: Niedermeier
authors.forename: D
authors.initials: D
authors.lastname: Magerl
authors.forename: Q
authors.initials: Q
authors.lastname: Zhong
authors.forename: A
authors.initials: A
authors.lastname: Nathan
authors.forename: V
authors.initials: V
authors.lastname: Körstgens
authors.forename: J
authors.initials: J
authors.lastname: Perlich
authors.forename: S V
authors.initials: SV
authors.lastname: Roth
authors.forename: P
authors.initials: P
authors.lastname: Müller-Buschbaum