1. School of Polymer Science and Polymer Engineering The University of Akron 170 University Ave Akron OH 44325 USA
2. Department of Chemical and Biomolecular Engineering University of Delaware 150 Academy St Newark DE 19716 USA
3. Evolution and Optics of Nanostructures Group Department of Biology Ghent University Ledeganckstraat 35 Ghent 9000 Belgium
4. NIST Center for Neutron Research National Institute of Standards and Technology 100 Bureau Drive Gaithersburg MD 20899 USA
5. Department of Materials Science and Engineering University of Maryland 4418 Stadium Dr College Park MD 20742 USA
6. Department of Chemistry Northwestern University Evanston IL 60208 USA
7. Department of Materials Science and Engineering Department of Biomedical Engineering Department of Pharmacology International Institute of Nanotechnology Simpson‐Querrey Institute Chemistry of Life Processes Institute Lurie Cancer Center Northwestern University Evanston IL 60208 USA
8. Department of Physics University of California San Diego 9500 Gilman Dr La Jolla CA 92093 USA
9. Department of Materials Science and Engineering University of Delaware 201 DuPont Hall Newark DE 19716 USA