1. NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
2. Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
3. Electron Microscopy Group of Materials Science, Korea Basic Science Institute, Daejeon 34133, Republic of Korea
4. Department of Materials Science and Engineering, Dong-A University, Busan 49315, Republic of Korea
5. Department of Materials Science and Engineering, University of Central Florida, Orlando, Florida 32826, United States
6. Department of Electrical and Computer Engineering, University of Central Florida, Orlando, Florida 32826, United States