1. Molecular Foundry; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
2. Department of Electrical and Computer Engineering; Boston University; Boston MA 02215 USA
3. Materials Science and Engineering Division; Boston University; Boston MA 02215 USA
4. Department of Chemistry; University of California, Berkeley; Berkeley CA 94720 US
5. Department of Materials and Interfaces; Weizmann Institute of Science; Rehovoth 76100 Israel
6. Physical Biosciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USA
7. Department of Physics; University of California Berkeley; Berkeley CA 94720 USA
8. Kavli Energy NanoSciences Institute at Berkeley; Berkeley CA 94720 USA
9. Materials Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 CA