Electronically Transparent Au--N Bonds for Molecular Junctions.
We report a series of single-molecule transport measurements carried out in an ionic environment with oligophenylenediamine wires. These molecules exhibit three discrete conducting states accessed by electrochemically modifying the contacts. Transport in these junctions is defined by the oligophenyl...
| Publicado en: | Journal of the American Chemical Society Vol. 139; no. 42; pp. 14845 - 14849 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Chemical Society
10/25/2017
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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=125899017&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 125899017 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: 10/25/2017 vid: 139 iid: 42 pid: 997 pub: American Chemical Society artinfo: ui: 125899017 10.1021/jacs.7b08370 ppf: 14845 ppct: 4 formats: tig: atl: Electronically Transparent Au--N Bonds for Molecular Junctions. aug: au: Yaping Zang Pinkard, Andrew Zhen-Fei Liu Neaton, Jeffrey B. Steigerwald, Michael L. Roy, Xavier Venkataraman, Latha affil: Department of Applied Physics, Columbia University, New York, New York 10027, United States Department of Chemistry, Columbia University, New York, New York 10027, United States Molecular Foundry, Lawrence Berkeley National Laboratory, and Department of Physics, University of California, Berkeley, California 94720, United States su: Phenylenediamines Electric admittance Density functional theory Electrodes Molecules sug: subj: Phenylenediamines Electric admittance Density functional theory Electrodes Molecules ab: We report a series of single-molecule transport measurements carried out in an ionic environment with oligophenylenediamine wires. These molecules exhibit three discrete conducting states accessed by electrochemically modifying the contacts. Transport in these junctions is defined by the oligophenylene backbone, but the conductance is increased by factors of ∼20 and ∼400 when compared to traditional dative junctions. We propose that the higher-conducting states arise from in situ electrochemical conversion of the dative Au←N bond into a new type of Au-N contact. Density functional theorybased transport calculations establish that the new contacts dramatically increase the electronic coupling of the oligophenylene backbone to the Au electrodes, consistent with experimental transport data. The resulting contact resistance is the lowest reported to date; more generally, our work demonstrates a facile method for creating electronically transparent metal-organic interfaces. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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