1. Department of Chemistry; Gangneung-Wonju National University; Gangneung Gangwon-do 210-702 South Korea
2. Department of Chemistry; University of Massachusetts Amherst; Amherst MA 01003 USA
3. Department of Physics; University of Massachusetts Amherst; Amherst MA 01003 USA
4. Integrative Technology Research Institute; Teijin Limited, 4-3-2 Asahigaoka Hino Tokyo 191-8512 Japan