1. State Key Laboratory of Materials‐Oriented Chemical Engineering Nanjing Tech University Nanjing 210009 P. R. China
2. Division of Machine Elements Luleå University of Technology Luleå 97187 Sweden
3. College of Biotechnology and Pharmaceutical Engineering National Engineering Technique Research Center for Biotechnology Nanjing Tech University No. 30, Puzhu South Road Nanjing 211816 China
4. State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Lanzhou 730000 China