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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster: Nanoparticles and Composite Materials

CPP 12.11: Poster

Monday, March 11, 2013, 17:30–19:30, Poster C

Thin films of sponge-like titania nanostructures with controllable thickness — •Lin Song, Martin A. Niedermeier, and Peter Müller-Buschbaum — TU München, Physik Department, LS Funkt. Mat., James-Franck-Str. 1, 85748 Garching, Germany

Titania nanostructures have a huge application potential, e.g. in photovoltaics, photocatalysis and gas sensing. For all these applications, a high surface area is important. Sponge-like titania nanostructures are especially promising due to their morphology with a high surface area and an interconnected network. The titania nanostructures are prepared from block copolymer templating in combination with sol-gel chemistry. The templated titania sol-gel is deposited on a substrate by spin-coating, via calcination the polymer template is combusted and nanostructured crystalline titania thin films are obtained. Additionally, the sol-gel approach allows for a control of the film thickness. The surface morphology is investigated with scanning electron microscopy (SEM) and optical microscopy (OM), the optical properties and the film thickness are probed with UV/Vis spectroscopy and ellipsometry.