1. Department of Physical Science and Engineering, Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
2. Department of Chemistry, Faculty of Science and Mathematics; Universiti Pendidikan Sultan Idris; Tanjong Malim Perak 35900 Malaysia
3. Olympus Co. Ltd.; 6666 Inatomi Tatsuno Kami-Ina-Gun, Nagano 399-0495 Japan