Regensburg 2019 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster Session I

CPP 17.4: Poster

Monday, April 1, 2019, 17:30–19:30, Poster B1

Biopolymer templated titanium dioxide films prepared via spray coating — •Julian Heger¹, Wei Chen¹, Sebastian Grott¹, Xinyu Jiang¹, Sigrid Bernstorff², and Peter Müller-Buschbaum¹ — ¹TU München, Physik-Department, LS für Funktionelle Materialien, 85748 Garching, Germany — ²Elettra-Sincrotrone Trieste S.C.p.A., Trieste, Italy

Nanostructured titanium dioxide films have great potential for application in photovoltaics, such as the inorganic counterpart in hybrid solar cells. For this purpose, the film morphology has crucial influence on the device performance, since a high surface-to-volume ratio is needed for efficient charge separation. So far, inorganic mesoporous matrices are successfully achieved by sol-gel chemistry in combination with block copolymer directed templating. As a novel approach, we use environmentally friendly biopolymers as tailoring agents. The whey protein ß-Lactoglobulin was found to form different structures within denaturation, from fibrils to spheres. By combining heat denaturation at different pH and sol-gel chemistry, different nanosized structures are introduced into titanium dioxide. The resulting sol-gels are used as inks for film deposition via spray coating. After calcination to remove the biopolymer template, the film morphologies of the remaining titanium dioxide scaffolds are investigated by grazing incidence small-angle X-ray scattering (GISAXS). GISAXS measurements are supplemented by scanning electron microscopy.