1. Institute
for Semiconductor Technology and Laboratory for Emerging Nanometrology, TU Braunschweig, Braunschweig 38092, Germany
2. MIND/IN2UB,
Department d’Enginyeries: Electrònica, Universitat de Barcelona, c. Martí Franquès 1, Barcelona 08028, Spain
3. Institute
of Energy Research and Physical Technologies, TU Clausthal, Leibnizstrasse
4, Clausthal-Zellerfeld 38678, Germany
4. Inorganic
Chemistry Department, National Research Centre (NRC), Cairo, Egypt
5. Institute
of Electrochemistry, TU Clausthal, Arnold-Sommerfeld-Str. 6, Clausthal-Zellerfeld 38678, Germany