1. Department of Applied Science and Technology Politecnico di Torino Torino Italy
2. Department of Industrial Engineering University of Rome “Tor Vergata” Rome Italy
3. Institute for the Study of Nanostructured Materials, ISMN — CNR Rome Italy
4. Thermochemical Energy R&D Group Korea Institute of Industrial Technology Cheonan‐si Republic of Korea
5. Department of Materials Science and Engineering Hanyang University Seoul Republic of Korea
6. Surface Technology R&D Group Korea Institute of Industrial Technology Incheon Republic of Korea