1. Laboratory for Atomistic and Molecular Mechanics (LAMM), Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
2. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
3. Departments of Oral Biology and Bioengineering, Center for Craniofacial Regeneration, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
4. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, United States
5. Departments of Chemistry, Materials Science and Engineering, Geoscience, University of Wisconsin, Madison, Wisconsin 53706, United States
6. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
7. Center for Computational Science and Engineering, Schwarzman College of Computing, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States