1. John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA
2. Wyss Institute for Biologically Inspired Engineering Harvard University Cambridge MA 02138 USA
3. Institute of Particle Technology Friedrich‐Alexander University Erlangen‐Nürnberg Cauerstrasse 4 91058 Erlangen Germany
4. Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02138 USA