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The conductance of porphyrin-based molecular nanowires increases with length
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Algethami, Norah, Sadeghi, Hatef, Sangtarash, Sara and Lambert, Colin J. (2018) The conductance of porphyrin-based molecular nanowires increases with length. Nano Letters, 18 (7). pp. 4482-4486. doi:10.1021/acs.nanolett.8b01621
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Official URL: http://dx.doi.org/10.1021/acs.nanolett.8b01621
Abstract
High electrical conductance molecular nanowires are highly desirable components for future molecular-scale circuitry, but typically molecular wires act as tunnel barriers and their conductance decays exponentially with length. Here, we demonstrate that the conductance of fused-oligo-porphyrin nanowires can be either length independent or increase with length at room temperature. We show that this negative attenuation is an intrinsic property of fused-oligo-porphyrin nanowires, but its manifestation depends on the electrode material or anchor groups. This highly desirable, nonclassical behavior signals the quantum nature of transport through such wires. It arises because with increasing length the tendency for electrical conductance to decay is compensated by a decrease in their highest occupied molecular orbital–lowest unoccupied molecular orbital gap. Our study reveals the potential of these molecular wires as interconnects in future molecular-scale circuitry.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QP Physiology T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > Engineering | ||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Molecular electronics, Conduction band, Porphyrins , Nanowires | ||||||||||||||||||
| Journal or Publication Title: | Nano Letters | ||||||||||||||||||
| Publisher: | American Chemical Society | ||||||||||||||||||
| ISSN: | 1530-6984 | ||||||||||||||||||
| Official Date: | 2018 | ||||||||||||||||||
| Dates: |
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| Volume: | 18 | ||||||||||||||||||
| Number: | 7 | ||||||||||||||||||
| Page Range: | pp. 4482-4486 | ||||||||||||||||||
| DOI: | 10.1021/acs.nanolett.8b01621 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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