1. Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätstr. 7, 45141 Essen, Germany
2. Facultad de Ingeniería Mecánica y Eléctrica (FIME), Universidad Autónoma de Nuevo León (UANL), Av. Pedro de Alba s/n, Ciudad Universitaria, 66455 San Nicolás de los Garza, Nuevo León, Mexico
3. Institute for Materials Science, Synthesis and Real Structure, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
4. Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätstr. 7, 45141 Essen, Germany
5. Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany
6. Laboratory for Electron Microscopy, Karlsruhe Institute of Technology (KIT), Engesserstr. 7, 76131 Karlsruhe, Germany