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DS: Dünne Schichten

DS 24: Poster presentation

DS 24.56: Poster

Dienstag, 28. März 2006, 15:00–17:30, P2

Surface morphology of solid supported phospholipid membranes on self-organized, nanostructured semiconductor substrates — •Gerald Trummer, Christian Hofer, Gregor Hlawacek, and Christian Teichert — Institute of Physics, University of Leoben, A-8700 Leoben, Austria

Self-organization effects during heteroepitaxy or ion bombardment of semiconductors frequently result in large area nanostructured substrates, which can be used as templates for further deposition of thin films. [1]

Here, we utilize nanofaceted SiGe films as well as ion bombarded Si and SiGe samples as templates for phospholipid (POPE) membranes. Atomic-force microscopy is applied to study the resulting film morphology as a function of deposition techniques and template geometry.

Areas of low lipid coverage show typical terrace structures. The height of single bilayers varies between 4 nm and 7 nm depending on hydration. Phase imaging allows identification of the boundary layer between substrate and lipid. For certain templates, the substrate morphology controls the film roughness and/or the lateral shape of the bilayer islands.

[1] C. Teichert, Appl. Phys. A 76, 653 (2003)