Dec 7 – 8, 2021 Online only
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GISANS study on whey protein and titania interfaces: Influence of pH on spray deposited biohybrid film morphology

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Dec 8, 2021, 10:30 AM
1h 30m
Board: P-28
Poster Soft Matter Poster Session II


Mr Julian E. Heger (TUM Physik E13)


Interfaces based on metal oxides play a major role in functional materials for energy applications. For example, TiO2 can serve as a photocatalyst in the production of hydrogen or as an anode material in emerging solar cell and battery technologies. In most applications, a designed structure is highly de-sired to fulfill performance conditions on different length scales. Moreover, devices benefit from a high interfacial area between functional layers and hence nanostructured TiO2 of high surface-to-volume ratio is favorable. Designed morphologies can be achieved and fabricated by industrial rele-vant, low-cost solution processing, e.g. spray deposition, with the help of diblock copolymer directed sol-gel synthesis. However, involved organic solvents limit the potential in environmentally friendly processing when it comes to an industrial scale. To overcome this, synthetic copolymers can be re-placed by water-soluble biopolymers. The bovine whey protein forms aggregates of different structures by denaturing at different pH values that can act as a template in water-based TiO2 synthesis. Different biohybrid films are obtained by spray deposition from the solutions at different pH. The films are in-vestigated with bulk and surface-sensitive grazing-incidence small-angle neutron scattering (GISANS) to understand the influence of pH on the morphology. The obtained results are complemented by real-space imaging.

Primary author

Mr Julian E. Heger (TUM Physik E13)


Mrs Christina Geiger (TUM Physik E13) Dr Lucas P. Kreuzer (TUM Physik E13) Mr Tobias Widmann (TUM Physik E13) Mrs Shanshan Yin (TUM Physik E13) Dr Alexandros Koutsioumpas (JCNS-MLZ) Prof. Peter Müller-Buschbaum (TUM Physik E13, MLZ)

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