Investigating molecular junctions based on mixed self-assembled monolayers to understand the impact of intermolecular interactions on transport
To interrogate the importance of intermolecular interactions on charge transport at the nanoscale, we investigate molecular tunnel junctions based on mixed self-assembled monolayers (SAMs) of 1-alkyl (CnT) thiols and their fluorinated counterparts (F-CnT) that have substantially different tunneling...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2024
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| In: |
ACS nano
Year: 2024, Volume: 18, Issue: 46, Pages: 32016-32022 |
| ISSN: | 1936-086X |
| DOI: | 10.1021/acsnano.4c09956 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acsnano.4c09956
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| Author Notes: | Jiajun Feng, Ioan Bâldea, Jiajie Gao, Gookyeong Jeong, C. Daniel Frisbie, and Zuoti Xie |
| Summary: | To interrogate the importance of intermolecular interactions on charge transport at the nanoscale, we investigate molecular tunnel junctions based on mixed self-assembled monolayers (SAMs) of 1-alkyl (CnT) thiols and their fluorinated counterparts (F-CnT) that have substantially different tunneling conductances. Experiments on mixed CnT1-x:F-CnTx SAMs between Au contacts reveal a strongly nonlinear (exponential) dependence of the tunneling conductance G on composition x, a behavior that is tempting to assign to the strong impact of intra-SAM intermolecular interactions. However, analysis suggests that the exponential dependence of G on x does not arise from intra-SAM intermolecular interactions, but instead emerges from the work function modification of the Au electrode which varies linearly with x. |
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| Item Description: | Online veröffentlicht: 6. November 2024 Gesehen am 23.07.2025 |
| Physical Description: | Online Resource |
| ISSN: | 1936-086X |
| DOI: | 10.1021/acsnano.4c09956 |