1. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
4. Materials Science Division (MSD), Lawrence Livermore National Laboratory, Livermore, California 94550, United States
5. Toyota Research Institute of North America, Ann Arbor, Michigan 48105, United States
6. Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, Michigan 48109, United States