1. Department
of Mechanical and Aerospace Engineering, ‡Materials Characterization and
Preparation Facility, and §Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
2. Key
Laboratory of Advanced Technology of Materials, School of Material
Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China