1. Fachbereich Physik Philipps Universität Marburg 35037 Marburg Deutschland
2. Institute of Industrial Biotechnology Government College University Lahore Punjab 54000 Pakistan
3. Electronics and Nano Devices lab (END) Department of Physics Faculty of Sciences South Valley University 83523 Qena Ägypten
4. Fraunhofer Institute for High-Speed Dynamics Ernst Mach Institute 79104 Freiburg Deutschland
5. Fachbereich Physik und Chemie, CHyN Universität Hamburg 20146 Hamburg Deutschland
6. Institute of Nano Biomedicine and Engineering Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education Department of Instrument Science and Engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China