1. Microelectronics Research Unit University of Oulu Oulu FI‐90570 Finland
2. Chemistry and Bioeconomy Team Centria University of Applied Sciences Kokkola FI‐67100 Finland
3. Center for Materials Engineering Addis Ababa Institute of Technology, 1000 Addis Ababa University School of Multi‐disciplinary Engineering Addis Ababa 1000 Ethiopia
4. Department of Physics Southern Illinois University Carbondale IL 62901 USA