1. Department of Mechanical Science and Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
2. Department of Mechanical Engineering University of Colorado Boulder CO 80309 USA
3. Materials Science and Engineering Program University of Colorado Boulder CO 80309 USA
4. INM – Leibniz Institute for New Materials Campus D2 2 66123 Saarbrücken Germany
5. Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02318 USA
6. Wyss Institute for Biologically Inspired Engineering Harvard University Cambridge MA 02138 USA
7. Kavli Institute for Bionano Science and Technology Harvard University Cambridge MA 02138 USA
8. John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA
9. The George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA