1. Department of Bioengineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
2. Nick Holonyak Jr. Micro and Nanotechnology Laboratory, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
3. Department of Mechanical Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
4. Department of Electrical and Computer Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
5. Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
6. Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States