Molecular charge transport

Understanding charge transport in single molecules is a critical step for designing new molecular electronic devices and materials for energy storage. Despite recent advances, our knowledge of molecular charge transport is limited by an inability to explore the vast chemical sequence space available for organic materials, coupled with difficulties in precisely quantifying charge transport in single molecules. To address these challenges, our group studies charge transport in single molecules including sequence-defined oligomers and redox-active materials. We use custom scanning tunneling microscope-break junction (STM-BJ) instruments for directly measuring molecular conductance in synthetic organic materials and biomaterials such as DNA, RNA, and proteins. Our work aims to understand molecular charge transport in new classes of materials that hold promise for energy storage, capture, and transport.

Selected publications:
1. S. Li, H. Yu, X. Chen, A. A. Gewirth, J. S. Moore, C. M. Schroeder, “Covalent Ag-C Bonding Contacts from Unprotected Terminal Acetylenes for Molecular Junctions”, Nano Letters, 20, 5490 (2020).
2. H. Yu*, S. Li*, K. E. Schwieter, Y. Liu, B. Sun, J. S. Moore, C. M. Schroeder, “Charge Transport in Sequence-defined Conjugated Oligomers”,¬†Journal of the American Chemical Society, 142, 4852 (2020).
3. S. Li*, H. Yu*, K. E. Schwieter, K. Chen, B. Li, Y. Liu, J. S. Moore, C. M. Schroeder, “Charge Transport and Quantum Interference in Oxazole-Terminated Conjugated Oligomers”, Journal of the American Chemical Society, 141, 16079 (2019).
4. B. Li, H. Yu, E. C. Montoto, Y. Liu, S. Li, K. Schwieter, J. Rodriquez-Lopez, J. S. Moore, C. M. Schroeder, “Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers”, ACS Applied Electronic Materials, 1, 7 (2019).
5. S. Li, J. Li, H. Yu, S. Pudar, B. Li, J. Rodr√≠guez-Lopez, J. S. Moore, C. M. Schroeder, “Characterizing Intermolecular Interactions in Redox-active Pyridinium-based Molecular Junctions”, Journal of Electroanalytical Chemistry, (2020).