1. Department of Applied Chemistry and Biochemical Engineering; Shizuoka University; Johoku 3-5-1 Naka-ku Hamamatsu, Shizuoka 432-8561 Japan
2. Division of Thermoelectrics for Waste Heat Recovery; Tokyo University of Science; 6-3-1 Niijuku Katsushika-ku Tokyo 125-8585 Japan