Photostability of gold nanoparticles with different shapes: the role of Ag clusters
- Autores
- Attia, Yasser A.; Buceta, David; Requejo, Félix Gregorio; Giovanetti, Lisandro José; López-Quintela, M. Arturo
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Anisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas spheres are very stable to photoirradiation, rods and prisms suffer from photocorrosion and finally dissolve completely with the production of Au(III) ions. Interpretation of these differences is based on the presence of semiconductor-like Ag clusters, adsorbed onto rods and prisms, able to photocorrode the Au nanoparticles, which are absent in the case of Au spheres. We further show direct evidence of the presence of Ag clusters in Au nanorods by XANES. These results confirm a previous hypothesis ( J. Am. Chem. Soc., 2014, 136, 1182–1185) about the major influence of very stable small Ag clusters, not only on the anisotropic formation of nanostructures but also on their photostability.
Facultad de Ciencias Exactas
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas - Materia
-
Ciencias Exactas
anisotropic gold nanostructures
seed method
Ag ions
photostability
UV irradiation - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/127795
Ver los metadatos del registro completo
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Photostability of gold nanoparticles with different shapes: the role of Ag clustersAttia, Yasser A.Buceta, DavidRequejo, Félix GregorioGiovanetti, Lisandro JoséLópez-Quintela, M. ArturoCiencias Exactasanisotropic gold nanostructuresseed methodAg ionsphotostabilityUV irradiationAnisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas spheres are very stable to photoirradiation, rods and prisms suffer from photocorrosion and finally dissolve completely with the production of Au(III) ions. Interpretation of these differences is based on the presence of semiconductor-like Ag clusters, adsorbed onto rods and prisms, able to photocorrode the Au nanoparticles, which are absent in the case of Au spheres. We further show direct evidence of the presence of Ag clusters in Au nanorods by XANES. These results confirm a previous hypothesis ( <i>J. Am. Chem. Soc.</i>, 2014, 136, 1182–1185) about the major influence of very stable small Ag clusters, not only on the anisotropic formation of nanostructures but also on their photostability.Facultad de Ciencias ExactasInstituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf11273-11279http://sedici.unlp.edu.ar/handle/10915/127795enginfo:eu-repo/semantics/altIdentifier/issn/2040-3372info:eu-repo/semantics/altIdentifier/doi/10.1039/C5NR01887Kinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:30:53Zoai:sedici.unlp.edu.ar:10915/127795Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:54.153SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| title |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| spellingShingle |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters Attia, Yasser A. Ciencias Exactas anisotropic gold nanostructures seed method Ag ions photostability UV irradiation |
| title_short |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| title_full |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| title_fullStr |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| title_full_unstemmed |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| title_sort |
Photostability of gold nanoparticles with different shapes: the role of Ag clusters |
| dc.creator.none.fl_str_mv |
Attia, Yasser A. Buceta, David Requejo, Félix Gregorio Giovanetti, Lisandro José López-Quintela, M. Arturo |
| author |
Attia, Yasser A. |
| author_facet |
Attia, Yasser A. Buceta, David Requejo, Félix Gregorio Giovanetti, Lisandro José López-Quintela, M. Arturo |
| author_role |
author |
| author2 |
Buceta, David Requejo, Félix Gregorio Giovanetti, Lisandro José López-Quintela, M. Arturo |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas anisotropic gold nanostructures seed method Ag ions photostability UV irradiation |
| topic |
Ciencias Exactas anisotropic gold nanostructures seed method Ag ions photostability UV irradiation |
| dc.description.none.fl_txt_mv |
Anisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas spheres are very stable to photoirradiation, rods and prisms suffer from photocorrosion and finally dissolve completely with the production of Au(III) ions. Interpretation of these differences is based on the presence of semiconductor-like Ag clusters, adsorbed onto rods and prisms, able to photocorrode the Au nanoparticles, which are absent in the case of Au spheres. We further show direct evidence of the presence of Ag clusters in Au nanorods by XANES. These results confirm a previous hypothesis ( <i>J. Am. Chem. Soc.</i>, 2014, 136, 1182–1185) about the major influence of very stable small Ag clusters, not only on the anisotropic formation of nanostructures but also on their photostability. Facultad de Ciencias Exactas Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
| description |
Anisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas spheres are very stable to photoirradiation, rods and prisms suffer from photocorrosion and finally dissolve completely with the production of Au(III) ions. Interpretation of these differences is based on the presence of semiconductor-like Ag clusters, adsorbed onto rods and prisms, able to photocorrode the Au nanoparticles, which are absent in the case of Au spheres. We further show direct evidence of the presence of Ag clusters in Au nanorods by XANES. These results confirm a previous hypothesis ( <i>J. Am. Chem. Soc.</i>, 2014, 136, 1182–1185) about the major influence of very stable small Ag clusters, not only on the anisotropic formation of nanostructures but also on their photostability. |
| publishDate |
2015 |
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2015 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/127795 |
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http://sedici.unlp.edu.ar/handle/10915/127795 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
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info:eu-repo/semantics/altIdentifier/issn/2040-3372 info:eu-repo/semantics/altIdentifier/doi/10.1039/C5NR01887K |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf 11273-11279 |
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