1. School of Materials Science and Engineering, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, Seoul 151-744, South Korea, Chemical and Bioscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA, Department of Ceramic Engineering, Kangnung National University, Kangnung, 210-702, South Korea, Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA, and School of Advanced Materials Engineering, Kookmin...