Regensburg 2004 – wissenschaftliches Programm
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SYLS: Life Sciences on the Nanometer Scale - Physics Meets Biology
SYLS 3: Symposium "Life Sciences on the Nanometer Scale - Physics Meets Biology"
SYLS 3.23: Poster
Mittwoch, 10. März 2004, 16:00–18:30, B
Optical characterisation of artifical confinements for protein folding — •Johannes Hohlbein1, Ulrike Rehn1, and Ralf B. Wehrspohn2 — 1Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany — 2Department of Physics, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany
We present a new method to characterize in-situ the optical thickness of porous alumina films by the use of photoluminescence-induced Fabry-Pèrot-interferences. Additionally we show, that the use of different electrolytes yields different photoluminescence pattern. A second experiment allows to determine the degree of filling of the pores by a liquid which is of importance when using the pores as templates for protein folding. First studies of the influence of geometrical confinement on protein folding will be presented.
Porous oxide growth on aluminium under anodic bias in various electrolytes has been studied for nearly 50 years. Recently, porous anodic alumina (PAA) films have been used to prepare nanostructures for a wide range of applications. In order to use porous alumina as template for protein folding in-situ optical measurements of their thickness as well as the degree of filling are required. It has been shown, that porous alumina exhibits a photoluminescence (PL) signal. We will use the PL pattern to determine the thickness and the degree of filling by Fabry-Pèrot-interferences.