Negative Differential Conductance in Polyporphyrin Oligomers with Nonlinear Backbones.
We study negative differential conductance (NDC) effects in polyporphyrin oligomers with nonlinear backbones. Using a low-temperature scanning tunneling microscope, we selectively controlled the charge transport path in single oligomer wires. We observed robust NDC when charge passed through a T-sha...
| Publicado en: | Journal of the American Chemical Society Vol. 140; no. 2; pp. 570 - 574 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
1/17/2018
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=127449362&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 127449362 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 1/17/2018 vid: 140 iid: 2 pid: 997 pub: American Chemical Society artinfo: ui: 127449362 10.1021/jacs.7b11016 ppf: 570 ppct: 4 formats: tig: atl: Negative Differential Conductance in Polyporphyrin Oligomers with Nonlinear Backbones. aug: au: Kuang, Guowen Yan, Linghao Lin, Nian Chen, Shi Zhang Chen, Ke Qiu Shang, Xuesong Liu, Pei Nian affil: Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China Shanghai Key Laboratory of Functional Materials Chemistry and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China su: Oligomers Electric admittance Scanning tunneling microscopy Density functional theory Green's functions Electrodes Molecular orbitals sug: subj: Oligomers Electric admittance Scanning tunneling microscopy Density functional theory Green's functions Electrodes Molecular orbitals ab: We study negative differential conductance (NDC) effects in polyporphyrin oligomers with nonlinear backbones. Using a low-temperature scanning tunneling microscope, we selectively controlled the charge transport path in single oligomer wires. We observed robust NDC when charge passed through a T-shape junction, bistable NDC when charge passed through a 90° kink and no NDC when charge passed through a 120° kink. Aided by density functional theory with nonequilibrium Green's functions simulations, we attributed this backbone-dependent NDC to bias-modulated hybridization of the electrode states with the resonant transport molecular orbital. We argue this mechanism is generic in molecular systems, which opens a new route of designing molecular NDC devices. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2018 holdings: @attributes: islocal: N |
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