SKM 2023 – scientific programme
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BP: Fachverband Biologische Physik
BP 11: Poster Session I
BP 11.14: Poster
Tuesday, March 28, 2023, 12:30–15:30, P1
Self-assembled Peptides Structure Mediated by Solid Interfaces. — •Leila Sahebmohammadi1, Regine von Klitzing1, Markus Mezger2, and Pol Besenius3 — 1Soft Matter at Interfaces, Department of Physics, Technical University of Darmstadt, Hochschulstraße 8, 64289 Darmstadt, Germany — 2Dynamics of condensed systems, Faculty of Physics, Universität Wien, Währinger Straße 38-42, 1090 Wien, Austria — 3Department of Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14D-55128 Mainz, Germany
In situ QCM-D reveal a layer-by-layer absorption of the oppositely charged peptides, forming a multilayer. The total amount of adsorbing peptides is derived by the adsorbed temperature and increases with increasing temperature. Exposure to high or low pH (12 or 2) removes the peptide stacks apparently due to reduced electrostatic interaction. AFM result shows the distribution pattern is nanorod-like. These experiments prove stable switchable blocks on the surface that can carry biological and colloidal materials.