Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: Membranes and vesicles I (joint session BP/CPP)
CPP 5.1: Vortrag
Montag, 1. April 2019, 09:30–09:45, H10
Soft Thermal Treatment Stabilizes Vacuum-deposited Phospholipid Layers for Sensor Applications — Sebastian Molina1, Marcelo Cisternas1, Maria J. Retamal2, Nicolas Moraga1, Hugo Zelada1, •Jonas Fortmann1,3, Tomas P. Corrales4, Patrick Huber5, Marco Soto-Arriaza2, and Ulrich G. Volkmann1 — 1Institute of Physics and CIEN-UC, P. Univ. Catolica de Chile, Santiago, Chile — 2Faculty of Chemistry and CIEN-UC, P. Univ. Catolica de Chile, Santiago, Chile — 3TU Clausthal, Germany — 4Department of Physics, UTFSM, Valparaiso, Chile — 5TUHH, Hamburg, Germany
Artificial membranes allow one to study of the behavior of biological membranes, which are the base of the cell membrane structure. The cell membrane is composed of different lipids and proteins that change their behavior when they are stimulated physically and/or chemically. Besides traditional methods we use a solvent free, dry method for phospholipid deposition in high vacuum onto residue-free silicon substrates. The cleanness of the substrate and the precise thickness of the DPPC layer on the substrate is controlled in-situ using Very High Resolution Ellipsometry. In this work we show the enhancement of phospholipid bilayer self-assembling and stability due to a soft thermal treatment. The behavior of the artificial membranes is studied in air and immersed in aqueous medium, which mimics the natural environment of the biological membrane. Acknowledgements: FONDECYT Nos. 3160803 (MJR), 1180939 (UGV) 1171047 (MSA) and 11160664 (TPC), CONICYT Fellowship (MC) and CONICYT-PIA ACT 1409.