Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species

Autores
Douglas Gallardo, Oscar Alejandro; Gomez, C. G.; Macchione, Micaela Alejandra; Cometto, Fernando Pablo; Coronado, Eduardo A.; Perez, Manuel Alejo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The morphological stability/morphological reshaping of noble metal nanoparticles are studied experimentally in order to unravel the chemical mechanisms lying beneath. Gold and silver nanoparticles (AuNPs and AgNPs, respectively) formed in a chloroformic environment are used, as model synthetic systems, to study the phenomena of morphological change. The morphological evolution of NPs that follows their formation, is characterized by spectroscopy (UV-visible, Raman and FTIR) and TEM (Transmission Electron Microscopy). The change of NP morphology involves the increase of the average NP size and the broadening of size distribution, in a close resemblance with the effect characteristically obtained from the Ostwald ripening. The effect of the poor solvating properties of chloroform in stabilizing small charged species (H+, Ag+, Au+) as well as the principle of electroneutrality of matter are analyzed in order to formulate a feasible reaction scheme consisting of a three-step process: the generation of soluble intermediary species by corrosion of nanoparticles, the diffusion of intermediary species from one nanoparticle to another, and the re-deposition process involving the reduction of intermediary species. This basic reaction scheme is used as a hypothesis to plan and perform experiments, which reveal that molecular oxygen dissolved in the dispersive medium can drive NP corrosion, however, protic species are also required as co-reactants. The polarity of the hydrogen bond and the ligand properties of the anions produced by de-protonation are features of the protic species that enable/disable corrosion and, in turn, the NP morphological evolution.
Fil: Douglas Gallardo, Oscar Alejandro. 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: Gomez, C. G.. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Orgánica; Argentina
Fil: Macchione, Micaela Alejandra. 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: Cometto, Fernando Pablo. 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: Coronado, Eduardo A.. 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: Perez, Manuel Alejo. 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
Materia
Nanoparticles
Ostwald Ripening
Mechanisms
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/51127
Acceder
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spelling Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic speciesDouglas Gallardo, Oscar AlejandroGomez, C. G.Macchione, Micaela AlejandraCometto, Fernando PabloCoronado, Eduardo A.Perez, Manuel AlejoNanoparticlesOstwald RipeningMechanismshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The morphological stability/morphological reshaping of noble metal nanoparticles are studied experimentally in order to unravel the chemical mechanisms lying beneath. Gold and silver nanoparticles (AuNPs and AgNPs, respectively) formed in a chloroformic environment are used, as model synthetic systems, to study the phenomena of morphological change. The morphological evolution of NPs that follows their formation, is characterized by spectroscopy (UV-visible, Raman and FTIR) and TEM (Transmission Electron Microscopy). The change of NP morphology involves the increase of the average NP size and the broadening of size distribution, in a close resemblance with the effect characteristically obtained from the Ostwald ripening. The effect of the poor solvating properties of chloroform in stabilizing small charged species (H+, Ag+, Au+) as well as the principle of electroneutrality of matter are analyzed in order to formulate a feasible reaction scheme consisting of a three-step process: the generation of soluble intermediary species by corrosion of nanoparticles, the diffusion of intermediary species from one nanoparticle to another, and the re-deposition process involving the reduction of intermediary species. This basic reaction scheme is used as a hypothesis to plan and perform experiments, which reveal that molecular oxygen dissolved in the dispersive medium can drive NP corrosion, however, protic species are also required as co-reactants. The polarity of the hydrogen bond and the ligand properties of the anions produced by de-protonation are features of the protic species that enable/disable corrosion and, in turn, the NP morphological evolution.Fil: Douglas Gallardo, Oscar Alejandro. 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: Gomez, C. G.. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Orgánica; ArgentinaFil: Macchione, Micaela Alejandra. 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: Cometto, Fernando Pablo. 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: Coronado, Eduardo A.. 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: Perez, Manuel Alejo. 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; ArgentinaRoyal Society of Chemistry2015-11-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/51127Douglas Gallardo, Oscar Alejandro; Gomez, C. G.; Macchione, Micaela Alejandra; Cometto, Fernando Pablo; Coronado, Eduardo A.; et al.; Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species; Royal Society of Chemistry; RSC Advances; 5; 122; 13-11-2015; 100488-1004972046-2069CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra17529a#!divAbstractinfo:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra17529ainfo:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4754205/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:14:10Zoai:ri.conicet.gov.ar:11336/51127instacron: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:34982025-11-05 10:14:10.452CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
title Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
spellingShingle Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
Douglas Gallardo, Oscar Alejandro
Nanoparticles
Ostwald Ripening
Mechanisms
title_short Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
title_full Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
title_fullStr Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
title_full_unstemmed Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
title_sort Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species
dc.creator.none.fl_str_mv Douglas Gallardo, Oscar Alejandro
Gomez, C. G.
Macchione, Micaela Alejandra
Cometto, Fernando Pablo
Coronado, Eduardo A.
Perez, Manuel Alejo
author Douglas Gallardo, Oscar Alejandro
author_facet Douglas Gallardo, Oscar Alejandro
Gomez, C. G.
Macchione, Micaela Alejandra
Cometto, Fernando Pablo
Coronado, Eduardo A.
Perez, Manuel Alejo
author_role author
author2 Gomez, C. G.
Macchione, Micaela Alejandra
Cometto, Fernando Pablo
Coronado, Eduardo A.
Perez, Manuel Alejo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Nanoparticles
Ostwald Ripening
Mechanisms
topic Nanoparticles
Ostwald Ripening
Mechanisms
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The morphological stability/morphological reshaping of noble metal nanoparticles are studied experimentally in order to unravel the chemical mechanisms lying beneath. Gold and silver nanoparticles (AuNPs and AgNPs, respectively) formed in a chloroformic environment are used, as model synthetic systems, to study the phenomena of morphological change. The morphological evolution of NPs that follows their formation, is characterized by spectroscopy (UV-visible, Raman and FTIR) and TEM (Transmission Electron Microscopy). The change of NP morphology involves the increase of the average NP size and the broadening of size distribution, in a close resemblance with the effect characteristically obtained from the Ostwald ripening. The effect of the poor solvating properties of chloroform in stabilizing small charged species (H+, Ag+, Au+) as well as the principle of electroneutrality of matter are analyzed in order to formulate a feasible reaction scheme consisting of a three-step process: the generation of soluble intermediary species by corrosion of nanoparticles, the diffusion of intermediary species from one nanoparticle to another, and the re-deposition process involving the reduction of intermediary species. This basic reaction scheme is used as a hypothesis to plan and perform experiments, which reveal that molecular oxygen dissolved in the dispersive medium can drive NP corrosion, however, protic species are also required as co-reactants. The polarity of the hydrogen bond and the ligand properties of the anions produced by de-protonation are features of the protic species that enable/disable corrosion and, in turn, the NP morphological evolution.
Fil: Douglas Gallardo, Oscar Alejandro. 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: Gomez, C. G.. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Química Orgánica; Argentina
Fil: Macchione, Micaela Alejandra. 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: Cometto, Fernando Pablo. 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: Coronado, Eduardo A.. 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: Perez, Manuel Alejo. 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
description The morphological stability/morphological reshaping of noble metal nanoparticles are studied experimentally in order to unravel the chemical mechanisms lying beneath. Gold and silver nanoparticles (AuNPs and AgNPs, respectively) formed in a chloroformic environment are used, as model synthetic systems, to study the phenomena of morphological change. The morphological evolution of NPs that follows their formation, is characterized by spectroscopy (UV-visible, Raman and FTIR) and TEM (Transmission Electron Microscopy). The change of NP morphology involves the increase of the average NP size and the broadening of size distribution, in a close resemblance with the effect characteristically obtained from the Ostwald ripening. The effect of the poor solvating properties of chloroform in stabilizing small charged species (H+, Ag+, Au+) as well as the principle of electroneutrality of matter are analyzed in order to formulate a feasible reaction scheme consisting of a three-step process: the generation of soluble intermediary species by corrosion of nanoparticles, the diffusion of intermediary species from one nanoparticle to another, and the re-deposition process involving the reduction of intermediary species. This basic reaction scheme is used as a hypothesis to plan and perform experiments, which reveal that molecular oxygen dissolved in the dispersive medium can drive NP corrosion, however, protic species are also required as co-reactants. The polarity of the hydrogen bond and the ligand properties of the anions produced by de-protonation are features of the protic species that enable/disable corrosion and, in turn, the NP morphological evolution.
publishDate 2015
dc.date.none.fl_str_mv 2015-11-13
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/11336/51127
Douglas Gallardo, Oscar Alejandro; Gomez, C. G.; Macchione, Micaela Alejandra; Cometto, Fernando Pablo; Coronado, Eduardo A.; et al.; Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species; Royal Society of Chemistry; RSC Advances; 5; 122; 13-11-2015; 100488-100497
2046-2069
CONICET Digital
CONICET
url http://hdl.handle.net/11336/51127
identifier_str_mv Douglas Gallardo, Oscar Alejandro; Gomez, C. G.; Macchione, Micaela Alejandra; Cometto, Fernando Pablo; Coronado, Eduardo A.; et al.; Morphological evolution of noble metal nanoparticles in chloroform: Mechanism of switching on/off by protic species; Royal Society of Chemistry; RSC Advances; 5; 122; 13-11-2015; 100488-100497
2046-2069
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra17529a#!divAbstract
info:eu-repo/semantics/altIdentifier/doi/10.1039/c5ra17529a
info:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4754205/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
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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