1. Guangdong Key Lab of Orthopaedic Technology and Implant Materials, Key Laboratory of Trauma & Tissue Repair of Tropical Area of PLA, General Hospital of Guangzhou Military Command of PLA, Guangzhou 510010, China
2. Key
Laboratory of Micro-nano Measurement, Manipulation and Physics (Ministry
of Education), Department of Physics, Beihang University, Beijing 100191, China
3. Department
of Physics, The University of Texas at Arlington, Arlington, Texas 76019-0059, United States