The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles

Autores
Gutierrez Wing, C.; Olmos Asar, Jimena Anahí; Esparza, R.; Mariscal, Marcelo; Yacaman, M. J.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Gutierrez Wing, C.. Instituto Nacional de Investigaciones Nucleares Ciencias Aplicadas-Tecnología de Materiales; México
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
Fil: Esparza, R.. Universidad Nacional Autónoma de México; México. University of Texas; Estados Unidos
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
Fil: Yacaman, M. J.. University of Texas; Estados Unidos
Materia
Monolayer-Protected Nps
Coalescence
Sintering
Thiol-Gold Cs-Stem
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/25020
Acceder
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spelling The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticlesGutierrez Wing, C.Olmos Asar, Jimena AnahíEsparza, R.Mariscal, MarceloYacaman, M. J.Monolayer-Protected NpsCoalescenceSinteringThiol-Gold Cs-Stemhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In 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.Fil: Gutierrez Wing, C.. Instituto Nacional de Investigaciones Nucleares Ciencias Aplicadas-Tecnología de Materiales; MéxicoFil: 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; ArgentinaFil: Esparza, R.. Universidad Nacional Autónoma de México; México. University of Texas; Estados UnidosFil: 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; ArgentinaFil: Yacaman, M. J.. University of Texas; Estados UnidosElsevier2013-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/25020Gutierrez 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; 301-3070013-4686CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.electacta.2012.12.103info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0013468612020774info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:27Zoai:ri.conicet.gov.ar:11336/25020instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:51:27.901CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
title The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
spellingShingle The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
Gutierrez Wing, C.
Monolayer-Protected Nps
Coalescence
Sintering
Thiol-Gold Cs-Stem
title_short The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
title_full The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
title_fullStr The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
title_full_unstemmed The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
title_sort The role of ad-atoms in the coalescence of alkanethiol-passivated gold nanoparticles
dc.creator.none.fl_str_mv Gutierrez Wing, C.
Olmos Asar, Jimena Anahí
Esparza, R.
Mariscal, Marcelo
Yacaman, M. J.
author Gutierrez Wing, C.
author_facet Gutierrez Wing, C.
Olmos Asar, Jimena Anahí
Esparza, R.
Mariscal, Marcelo
Yacaman, M. J.
author_role author
author2 Olmos Asar, Jimena Anahí
Esparza, R.
Mariscal, Marcelo
Yacaman, M. J.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Monolayer-Protected Nps
Coalescence
Sintering
Thiol-Gold Cs-Stem
topic Monolayer-Protected Nps
Coalescence
Sintering
Thiol-Gold Cs-Stem
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Gutierrez Wing, C.. Instituto Nacional de Investigaciones Nucleares Ciencias Aplicadas-Tecnología de Materiales; México
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
Fil: Esparza, R.. Universidad Nacional Autónoma de México; México. University of Texas; Estados Unidos
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
Fil: Yacaman, M. J.. University of Texas; Estados Unidos
description 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.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/25020
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
0013-4686
CONICET Digital
CONICET
url http://hdl.handle.net/11336/25020
identifier_str_mv 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
0013-4686
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.electacta.2012.12.103
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0013468612020774
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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