1. The Petroleum and Petrochemical College, Chulalongkorn University, Chula Soi 12, Phyathai Road, Pathumwan, Bangkok, Thailand 10330, Department of Future Industry-oriented Basic Science and Materials, Graduate School of Engineering, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan, and Department of Advanced Fibro-science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan