1. Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 430074 P. R. China
2. Institute for Advanced Materials Hubei Normal University Huangshi 435002 P. R. China
3. School of Materials Science and Engineering Center of Advanced Analysis & Gene Sequencing Zhengzhou University Zhengzhou 450001 P. R. China
4. Institute of Materials Research and Engineering (IMRE) A*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way Singapore 138634 Singapore
5. Shenzhen Research Institute China University of Geosciences Shenzhen 518063 P. R. China
6. Zhejiang Institute China University of Geosciences Hangzhou 311305 P. R. China
7. School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore