Affiliation: | (1) Department of Nano-Material Systems, Graduate School of Engineering, Gunma University, Kiryu Gunma, 376-8515, Japan;(2) Fuji Carbon Co. Ltd., Kohka, Shiga 520-3401, Japan;(3) Department of Nano-Material Systems, Graduate School of Engineering, Gunma University, Kiryu Gunma, 376-8515, Japan |