1. Technology Research Laboratory, Corporate Research Center, Mitsubishi Paper Mills Limited, 46 Wadai, Tsukuba-city, Ibaraki, 300-4247, Japan, Development Laboratory, Corporate Research Center, Mitsubishi Paper Mills Limited, 1-606 Kaiden, Nagaokakyo-city, Kyoto, 617-8666, Japan, and Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 1-1 Katahira 2-Chome, Aoba-ku, Sendai 980-8577, Japan