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HL: Fachverband Halbleiterphysik
HL 33: Optical properties
HL 33.7: Vortrag
Dienstag, 17. März 2020, 15:30–15:45, POT 112
Influence of Amino Acids on the Optical Properties of Cu2O-Amino-Acid Cocrystals — •Mariam Kurashvili1, Iryna Polishchuk2, Simone Strohmair1, Boaz Pokroy2, and Jochen Feldmann1 — 1Chair for Photonics and Optoelectronics, Nano-Institute Munich and Department of Physics, Ludwig-Maximilians-Universität (LMU), Königinstr. 10, 80539 Munich, Germany — 2Department of Materials Science and Engineering and the Russell Berrie Nanotechnology Institute, Technion - Israel Institute of Technology, 32000 Haifa, Israel
Biomineral systems are composed of organic and inorganic compounds. These materials exhibit highly interesting properties. For example, it was found that hardness of calcite single crystals can be increased via embedding amino acids in its lattice [1]. Also optical properties can be altered by amino acid incorporation, as a recent study of our group showed for zinc oxide [2,3]. Copper oxide is a very versatile direct band gap semiconductor, having promising applications in photovoltaics and water splitting. In this context, we report the optical properties of a model biomineral system consisting of copper oxide-amino acid co-crystals. We use steady state and time resolved photoluminescence spectroscopy, along with scanning electron microscopy to elucidate the changes, which are induced by different concentrations of amino acids in copper oxide. Our study emphasizes the great impact of amino acids on the optical and thus intrinsic structural properties of copper oxide.
[1] Y. Kim. et al., Nature Mat. 15, 903 (2016)
[2] A. Madathumpady et al., J. Phys. Chem. C 122, 6348 (2018)
[3] A. Brif et. al. Adv. Mater., 26, 477–481 (2014)