1. Department of Materials Science and Engineering; Korea Advanced Institute of Science and Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 305-701 South Korea
2. Powder Technology Department; Korea Institute of Materials Science (KIMS); Changwon 641831 South Korea
3. Department of Electrical and Computer Engineering; University of Houston; 4800 Calhoun Road Houston TX 77204 USA
4. Center for Materials Architecturing; Korea Institute of Science and Technology (KIST); Hwarangno 14-gil 5 Seong-buk-gu, Seoul 136-791 South Korea