1. Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
2. Department of Chemical and Biomolecular Engineering, Colburn Laboratory, University of Delaware, Newark, Delaware 19716, United States
3. Department of Chemical and Biomolecular Engineering, Colburn Laboratory, Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
4. Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
5. Marine Biology Research Division, Scripps Institution of Oceanography, La Jolla, California 92093-0202, United States
6. Evolution and Optics of Nanostructures Group, Department of Biology, The University of Ghent, 9000 Ghent, Belgium