1. Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
2. COMP Centre of Excellence, Department of Applied Physics, Aalto University, Helsinki FI-00076, Finland
3. Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf 40237, Germany
4. Division of Electrical Engineering and Computer Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
5. Applied Chemistry Section, Department of Materials Science, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 840-8550 Japan
6. Nanomaterials Research Institute (NanoMaRi), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan