1. Department of Mechanical Engineering, University of Colorado Denver, Denver, Colorado 80217, United States
2. Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
3. College of Mechanical and Vehicle Engineering, Hunan University, Hunan 410006, P. R. China
4. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, P. R. China