Affiliation: | 1. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, 8050 Ikarashi‐2, Niigata 950‐2181 (Japan);2. Precursory Research for Embryonic Science (PRESTO), Science and Technology Agency (JST), 4‐1‐8 Honcho, Kawaguchi, Saitama 332‐0012 (Japan) |