1. Department of Biomedical Engineering, McCormick School of Engineering, Northwestern University, Evanston, Illinois 60208, United States
2. Department of Chemical and Biological Engineering, McCormick School of Engineering, Northwestern University, Evanston, Illinois 60208, United States
3. Northwestern University Atomic and Nanoscale Characterization and Experimentation Center, Northwestern University, Evanston, Illinois 60208, United States
4. Center for Synthetic Biology, McCormick School of Engineering, Northwestern University, Evanston, Illinois 60208, United States