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• W2549152377 abstract "Abstract In contrast with conventional single-molecule junctions, in which the current flows parallel to the long axis or plane of a molecule, we investigate the transport properties of M(II)-5,15-diphenylporphyrin (M-DPP) single-molecule junctions (M=Co, Ni, Cu, or Zn divalent metal ions), in which the current flows perpendicular to the plane of the porphyrin. Novel STM-based conductance measurements combined with quantum transport calculations demonstrate that current-perpendicular-to-the-plane (CPP) junctions have three-orders-of-magnitude higher electrical conductances than their current-in-plane (CIP) counterparts, ranging from 2.10 −2 G 0 for Ni-DPP up to 8.10 −2 G 0 for Zn-DPP. The metal ion in the center of the DPP skeletons is strongly coordinated with the nitrogens of the pyridyl coated electrodes, with a binding energy that is sensitive to the choice of metal ion. We find that the binding energies of Zn-DPP and Co-DPP are significantly higher than those of Ni-DPP and Cu-DPP. Therefore when combined with its higher conductance, we identify Zn-DPP as the favoured candidate for high-conductance CPP single-molecule devices." @default.
• W2549152377 created "2016-11-30" @default.
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• W2549152377 date "2016-11-21" @default.
• W2549152377 modified "2023-10-10" @default.
• W2549152377 title "Tuning the electrical conductance of metalloporphyrin supramolecular wires" @default.
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• W2549152377 doi "https://doi.org/10.1038/srep37352" @default.
• W2549152377 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5116753" @default.
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