1. Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea.
2. Tribology Research Lab, Yonsei University, Seoul 03722, Korea.
3. ZJU-UIUC Institute, Zhejiang University, Haining, Zhejiang 314400, China.
4. School of Mechanical Engineering, Kookmin University, Seoul 02707, Korea.
5. Department of Mechanical Engineering, University of Tokyo, Tokyo 113-8656, Japan.
6. PG & Research Department of Physics, PSG College of Arts & Science, Coimbatore, 641014 Tamil Nadu, India.