SKM 2021 – wissenschaftliches Programm
CPP 8.5: Poster
Mittwoch, 29. September 2021, 17:30–19:30, P
Inorganic-organic hybrid nanostructures based on biopolymer templating — •Linus Fidelis Huber and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching
Inorganic-organic hybrid nanostructures are researched for many different applications. This work is focused on energy conversion through the thermoelectric effect, where electrical current can be generated from a temperature difference. However, the state of the art thermoelectric generators (TEG) often use materials like bismuth (Bi), tellurium (Te), antimony (Sb) or lead (Pb). These materials are toxic and expensive, giving rise to a need for a cleaner and more abundant alternative that still produces good conversion efficiencies. The efficiency of materials to produce thermoelectric power is mainly governed by three factors. The Seebeck coefficient, the electrical conductivity and the thermal conductivity. These parameters can be improved by changing the material morphology. For example, a sufficient percolation network can increase electrical conductivity. Beta-lactoglobulin is a bovine whey bio-polymer, that is known to form different aggregates under different environmental conditions. This material is used to structure and improve the performance of titania films. The differently structured beta-lactoglobulin-titania thin-films are studied with AFM and SEM as well as the Seebeck coefficient, thermal conductivity and electrical conductivity are measured using a 4-point probe setup.