1. Department of Bioengineering and California Institute for Quantitative Biosciences (QB3), University of California at Berkeley, Berkeley, California 94720, United States
2. Simula Research Laboratory, 0164 Oslo, Norway
3. Department of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
4. Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California 94720, United States