1. Department of Chemistry, University of Georgia, Athens, Georgia 30602, United
States
2. Molecular Nanoelectronics, Faculty of Engineering & Nanoscale Science and Engineering Center, University of Georgia, Athens, Georgia 30602, United States
3. AptaRes AG, Am Scheunenviertel 1, D-15749 Mittenwalde, Germany
4. Robert Koch Institut, Nordufer 20, D-13353 Berlin, Germany