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dc.contributor.author
Ghalgaoui, Ahmed
dc.contributor.author
Doudin, Nassar
dc.contributor.author
Calaza, Florencia Carolina
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dc.contributor.author
Surnev, Svetlozar
dc.contributor.author
Sterrer, Martin
dc.date.available
2017-06-21T20:45:48Z
dc.date.issued
2016-07
dc.identifier.citation
Ghalgaoui, Ahmed; Doudin, Nassar; Calaza, Florencia Carolina; Surnev, Svetlozar; Sterrer, Martin; Ordered Au Nanoparticle Array on Au(111) through Coverage Control of Precursor Metal−Organic Chains; American Chemical Society; Journal Of Physical Chemistry C; 120; 31; 7-2016; 17418-17426
dc.identifier.issn
1932-7447
dc.identifier.uri
http://hdl.handle.net/11336/18595
dc.description.abstract
Metal–organic overlayer structures formed by 1,4-phenylene-diisocyanide (PDI) and Au adatoms on Au(111) in UHV, their stability in air, and the tip-induced Au nanoparticle formation on PDI–Au(111) surfaces in air were investigated using scanning tunneling microscopy (STM) and vibrational spectroscopy. This study reveals that the distribution of Au nanoparticles created during tip-induced release of Au atoms from molecule-Au adatom complexes shows strong dependence on the PDI coverage. Ordered Au nanoparticle arrays form in the medium-coverage regime, while more disordered distributions are observed at low and saturation coverages. The different distributions of Au nanoparticles are a direct consequence of the coverage-dependent assembly of (PDI–Au)n chains, their different stability in air, and a templating effect of the Au(111) surface, which is most pronounced for medium coverage, where phases of densely packed (PDI–Au)n chains and disordered PDI–Au assemblies are confined, respectively, to the fcc and hcp regions of the (22 × √3) surface reconstruction of Au(111). The Au nanoparticles nucleate preferentially in the disordered or defective regions of the PDI–Au precursor overlayer, and their formation requires ambient air and high negative tip-bias, suggesting an electrochemical initiation of Au release from the molecule–Au adatom complexes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Au(111)
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Nanoparticles
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Adsorption
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Aromatic
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.subject.classification
Nano-materiales
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Nanotecnología
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Ordered Au Nanoparticle Array on Au(111) through Coverage Control of Precursor Metal−Organic Chains
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-08T19:27:47Z
dc.journal.volume
120
dc.journal.number
31
dc.journal.pagination
17418-17426
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Washington
dc.description.fil
Fil: Ghalgaoui, Ahmed. University Of Graz. Institute Of Physics; Austria
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Fil: Doudin, Nassar. University Of Graz. Institute Of Physics; Austria
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Fil: Calaza, Florencia Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Fritz-Haber-Institut der Max-Planck-Gesellschaft; Alemania
dc.description.fil
Fil: Surnev, Svetlozar. University Of Graz. Institute Of Physics; Austria
dc.description.fil
Fil: Sterrer, Martin. University Of Graz. Institute Of Physics; Austria
dc.journal.title
Journal Of Physical Chemistry C
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/acs.jpcc.6b04630
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b04630
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