1. Key Laboratory of Marine Materials and Related Technologies; Zhejiang Key Laboratory of Marine Materials and Protective Technologies; Chinese Academy of Sciences; Ningbo Institute of Materials Technology and Engineering; Ningbo 315201 P. R. China
2. Materials and Life Science Research Division; Korea Institute of Science and Technology; Seoul 136-791 Republic of Korea
3. University of Chinese Academy of Sciences; Beijing 100049 P. R. China
4. Electronic Materials Research Center; Korean Institute of Science and Technology; Seoul 136-791 Republic of Korea