1. Faculty of Engineering, Department of Materials Science and Engineering, Institute for Surface Science and Corrosion, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstrasse 7, Erlangen 91058, Germany
2. Department of Physics, Biophysics Group, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 91, Erlangen 91052, Germany
3. Chemistry Department, Faculty of Sciences, King Abdul-Aziz University, Jeddah 80203, Saudi Arabia
4. Regional Centre of Advanced Technologies and Materials, Palacky University, Listopadu 50A, Olomouc 772 07, Czech Republic