Contact transparency of nanotube-molecule-nanotube junctions |
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Authors: | Ke San-Huang Baranger Harold U Yang Weitao |
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Affiliation: | Department of Chemistry, Duke University, Durham, NC 27708-0354, USA. |
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Abstract: | The transparency of contacts between conjugated molecules and metallic single-walled carbon nanotubes is investigated using a single-particle Green's function method which combines a Landauer approach with ab initio density functional theory. We find that the overall conjugation required for good contact transparency is broken by connecting through a six-member ring on the tube. Full conjugation achieved by an all-carbon contact through a five-member ring leads to near perfect contact transparency for different conjugated molecular bridges. |
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