[1] Department of Materials Science and Engineering, National University of Singapore, Singapore,117575, Singapore
[2] Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang,110016, China
[3] Center of Electron Microscope, State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou,310027, China
[4] Singapore Synchrotron Light Source (SSLS), National University of Singapore, Singapore,117603, Singapore
[5] NUSNNI-Nanocore, National University of Singapore, Singapore,117411, Singapore