1. Faculty of Natural Science, Institute of Physics, Semiconductor Physics, Chemnitz University of Technology, Chemnitz 09107, Germany
2. Faculty of Natural Science, Institute of Chemistry, Coordination Chemistry, Chemnitz University of Technology, Chemnitz 09107, Germany
3. Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
4. Faculty of Natural Science, Institute of Physics, Analysis of Solid Surfaces, Chemnitz University of Technology, Chemnitz 09107, Germany