Dresden 2020 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 5: Biopolymers, Biomaterials and Bioinspired Functional Materials (joint session CPP/BP)

CPP 5.3: Talk

Monday, March 16, 2020, 10:00–10:15, ZEU 114

Tracing the film formation of biotemplated titania nanostructures during spray coating with in situ GIXS techniques — •Julian E. Heger¹, Wei Chen¹, Calvin J. Brett^2,3, Wiebke Ohm³, Stephan V. Roth^2,3, and Peter Müller-Buschbaum^1,4 — ¹Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Straße 1, 85748 Garching, Germany — ²Royal Institute of Technology KTH, Teknikringen 34-35, 100 44 Stockholm, Sweden — ³Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany — ⁴Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany

An interesting approach in soft matter science is to substitute synthetic polymers with biopolymers, such as proteins. Being water soluble and non-toxic, they open a way to greener processing. We are interested in the structure directing properties of the bovine whey protein ß-lactoglobulin (ß-lg) for thin titania films. For this, denatured ß-lg is mixed with established titania precursors to form a sol-gel, which can be eventually deposited. Spray deposition is chosen as a fast technique of low material wastage and hence of industrial relevance. In situ grazing incidence X-ray scattering measurements are performed simultaneously in small- and wide-angle regime (GISAXS/GIWAXS) to reveal the morphological changes and timescales of lateral growth upon film formation. After calcination of the as-deposited samples, the remaining titania scaffolds can be backfilled with organic semiconductors in order to build e.g. hybrid photoactive layers.