1. Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104–6323, USA.
2. Department of Bioengineering and Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
3. Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104–6323, USA.
4. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
5. Department of Chemistry, University of Minnesota, Minneapolis, MN 55455–0431, USA.
6. Institute for Computational Molecular Science, Temple University, Philadelphia, PA 19122, USA.
7. Nanoscience Center, Department of Chemistry, University of Jyväskylä, 40014 JYU, Finland.
8. Molecular Materials, Department of Applied Physics, School of Science and Technology, Aalto University, FI-02150, Espoo, Finland.