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dc.contributor.author
Gutierrez Wing, C.
dc.contributor.author
Olmos Asar, Jimena Anahí
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Esparza, R.
dc.contributor.author
Mariscal, Marcelo
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Yacaman, M. J.
dc.date.available
2017-09-22T22:25:41Z
dc.date.issued
2013-01
dc.identifier.citation
Gutierrez Wing, C.; Olmos Asar, Jimena Anahí; Esparza, R.; Mariscal, Marcelo; Yacaman, M. J.; The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles; Elsevier; Electrochimica Acta; 101; 1-2013; 301-307
dc.identifier.issn
0013-4686
dc.identifier.uri
http://hdl.handle.net/11336/25020
dc.description.abstract
In the present work we show how the role of ad-atoms and surface imperfections play a key role during the coalescence of thiol-passivated Au nanoparticles (NPs) below 4 nm in diameter. Using spherical aberration corrected scanning transmission electron microscopy (STEM) with ultra-high resolution and computer simulations we reveal the main structural and energetic changes throughout the diffusion/migration of surface atoms during coalescence of monolayer-protected NPs. The sintering process of nanoparticles with similar size (diameter) follows a neck-formation mechanism. However, in the case of thiol-protected Au NPs with different size (i.e. with dissimilar surface curvature) the Ostwald ripening mechanism has been detected with atomic resolution in situ STEM measurements for the first time. In particular we have observed how the larger particles grow in size at the expense of the smaller ones, until the latter completely disappear. The experimental findings have been supported with the aid of state-of-the-art computer simulations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Monolayer-Protected Nps
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Coalescence
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Sintering
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Thiol-Gold Cs-Stem
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-09-21T19:05:45Z
dc.journal.volume
101
dc.journal.pagination
301-307
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Gutierrez Wing, C.. Instituto Nacional de Investigaciones Nucleares Ciencias Aplicadas-Tecnología de Materiales; México
dc.description.fil
Fil: Olmos Asar, Jimena Anahí. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.description.fil
Fil: Esparza, R.. Universidad Nacional Autónoma de México; México. University of Texas; Estados Unidos
dc.description.fil
Fil: Mariscal, Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina
dc.description.fil
Fil: Yacaman, M. J.. University of Texas; Estados Unidos
dc.journal.title
Electrochimica Acta
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.electacta.2012.12.103
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0013468612020774
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