1. Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
2. Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
3. Polymers Branch, Sciences of Extreme Materials Division, U.S. DEVCOM Army Research Laboratory, Aberdeen Proving Grounds, Maryland 21005, United States
4. Chemical Science and Engineering Division and Center for Molecular Engineering, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60434, United States