1. Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA.
2. Department of Chemistry, Duke University, Durham, NC, USA.
3. Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
4. Department of Chemistry, Northwestern University, Evanston, IL, USA.
5. Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA.
6. Department of Electrical Engineering, Stanford University, Stanford, CA, USA.
7. Stanford SystemX Alliance, Stanford University, Stanford, CA, USA.