1. School of Materials Science and Engineering
2. Center of Advanced Lubrication and Seal Materials
3. Northwestern Polytechnical University
4. Xi'an
5. China
6. Department of Materials Science and Engineering
7. Northwestern University
8. Evanston
9. USA
10. International Institute for Nanotechnology (IIN), Northwestern University
11. Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center
12. Department of Mechanical Engineering