1. Department of Materials Science and Engineering; Pusan National University; San 30 Jangjeon-dong Geumjeong-gu Busan 609-735 Republic of Korea
2. Department of Mechanical Convergence Engineering; Hanyang University; 17 Haengdang-dong Seongdong-gu Seoul 133-791 Republic of Korea), Fax: (+82) 2-2220-2299
3. Institute of Applied Physics and Materials Engineering; University of Macau; Avenida da Universidade Taipa Macau China), Fax: (+853) 8822-2426