Precise Regulation of Ultralow Conductance Attenuation in Single-Molecule Hexabenzocoronene Oligomers
Efficient long-range charge transport within molecular wires, which hinges upon ultralow length-dependent conductance attenuation, is essential for molecular electronics and optoelectronics applications. In this study, a series of hexabenzocoronene oligomers are synthesized, and their charge transport behaviors are investigated by using both dynamic and static single-molecule junction techniques. Remarkably, hexabenzocoronene oligomer-based dynamic single-molecule junctions with gold electrodes show an exceptionally low conductance attenuation coefficient of ∼0.046 Å–1, while static single-molecule junctions based on graphene electrodes exhibit a triple value of conductance attenuation. Via the introduction of ionic liquid gates, the molecular conductance is regulated effectively, reducing the attenuation coefficient by more than 50%, due to precise control of the energy offset between the Fermi level of the electrodes and the molecular energy levels. These findings, particularly the efficient control of the molecular conductance attenuation at ultralow levels, indicate a novel approach to achieving long-range transport for practical molecular electronics.
Authors
- Chuancheng Jia (ORCID: https://orcid.org/0000-0002-1513-8497)
- Hongxing Jia (ORCID: https://orcid.org/0000-0002-5329-6904)
- Jie Hao (ORCID: https://orcid.org/0000-0003-1276-2363)
- Pingwu Du (ORCID: https://orcid.org/0000-0002-2715-0979)
- Miao Zhang (ORCID: https://orcid.org/0000-0003-4509-8569)
- Li Zhou (ORCID: https://orcid.org/0000-0002-7508-6633)
- Enyu Zhang (ORCID: https://orcid.org/0000-0003-4824-0268)
- Xuefeng Guo (ORCID: https://orcid.org/0000-0001-5723-8528)
- Ying Chen (ORCID: https://orcid.org/0000-0003-0708-828X)
- Baoyi Wang (ORCID: https://orcid.org/0000-0002-7613-5708)
- Wenzhe Liu
- Jinying Wang (ORCID: https://orcid.org/0000-0003-1445-9667)
- Cong Zhao (ORCID: https://orcid.org/0000-0003-2238-3711)
Institutions
- University of Science and Technology of China (CN)
- Chongqing University (CN)
- Peking University (CN)
- Nankai University (CN)
- Hefei National Center for Physical Sciences at Nanoscale (CN)
- Beijing National Laboratory for Molecular Sciences (CN)
- Collaborative Innovation Center of Chemistry for Energy Materials (CN)
Publication Details
- Journal
- ACS Materials Letters
- Published
- 2024-08-22
- DOI
- https://doi.org/10.1021/acsmaterialslett.4c01521
- Citations
- 2
- Primary Topic
- Molecular Junctions and Nanostructures
- Type
- article
- Field-Weighted Citation Impact
- 0.42
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Beijing Municipality
- National Key Research and Development Program of China
- Beijing National Laboratory for Molecular Sciences