1. Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, Singapore 117576
2. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, #08-03 Innovis, Singapore, Singapore 138634
3. Material Science Engineering, Yonsei University, 50 Yonsei, Seodaemun, Seoul 03722, South Korea
4. Department of Material Science and Engineering, İstanbul Technical University, 34469 Istanbul, Turkey
5. Singapore Synchrotron Light Source, National University of Singapore, 5 Research Link, Singapore, Singapore 117603
6. Department of Physics, Middle East Technical University, 06800 Ankara, Turkey