Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis
- Autores
- Azcárate, Julio César; Fonticelli, Mariano Hernan; Zelaya, Maria Eugenia
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In this work, it is shown that thiol-protected Au nanoparticles (AuNPs@SR) of approximately 3.4 nm size suffered unexpectedly high radiation damage under standard transmission electron microscopy (TEM) operating conditions. For metallic systems (conducting sample), it is expected that the greatest contribution to the damage comes from knock-on displacement, but radiolysis is the most probable radiation damage mechanism for organic samples. The radiation damage of the electron beam produces huge changes in AuNPs' structure, leading to coalescence of the Au cores when their {100} surfaces are facing each other. The complete coalescence process involve thiol desoprtion, AuNPs' reorientation, and surface diffusion of Au adatoms, which produce the oriented attachment of the Au cores. The knock-on displacement cannot explain by itself the time taken by the entire process. Through a rigorous analysis, we rationalize the results considering that because of the small size of AuNPs they have a lower electron density than the bulk material which favors radiolytic damage.
Fil: Azcárate, Julio César. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina
Fil: Fonticelli, Mariano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Zelaya, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina - Materia
-
Nanoparticles
Radiation damage
TEM - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/70478
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Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM AnalysisAzcárate, Julio CésarFonticelli, Mariano HernanZelaya, Maria EugeniaNanoparticlesRadiation damageTEMhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In this work, it is shown that thiol-protected Au nanoparticles (AuNPs@SR) of approximately 3.4 nm size suffered unexpectedly high radiation damage under standard transmission electron microscopy (TEM) operating conditions. For metallic systems (conducting sample), it is expected that the greatest contribution to the damage comes from knock-on displacement, but radiolysis is the most probable radiation damage mechanism for organic samples. The radiation damage of the electron beam produces huge changes in AuNPs' structure, leading to coalescence of the Au cores when their {100} surfaces are facing each other. The complete coalescence process involve thiol desoprtion, AuNPs' reorientation, and surface diffusion of Au adatoms, which produce the oriented attachment of the Au cores. The knock-on displacement cannot explain by itself the time taken by the entire process. Through a rigorous analysis, we rationalize the results considering that because of the small size of AuNPs they have a lower electron density than the bulk material which favors radiolytic damage.Fil: Azcárate, Julio César. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaFil: Fonticelli, Mariano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Zelaya, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); ArgentinaAmerican Chemical Society2017-11-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/70478Azcárate, Julio César; Fonticelli, Mariano Hernan; Zelaya, Maria Eugenia; Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis; American Chemical Society; Journal of Physical Chemistry C; 121; 46; 19-11-2017; 26108-261161932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/10.1021/acs.jpcc.7b08525info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.7b08525info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:46:22Zoai:ri.conicet.gov.ar:11336/70478instacron: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:34982025-09-29 09:46:22.848CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
title |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
spellingShingle |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis Azcárate, Julio César Nanoparticles Radiation damage TEM |
title_short |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
title_full |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
title_fullStr |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
title_full_unstemmed |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
title_sort |
Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis |
dc.creator.none.fl_str_mv |
Azcárate, Julio César Fonticelli, Mariano Hernan Zelaya, Maria Eugenia |
author |
Azcárate, Julio César |
author_facet |
Azcárate, Julio César Fonticelli, Mariano Hernan Zelaya, Maria Eugenia |
author_role |
author |
author2 |
Fonticelli, Mariano Hernan Zelaya, Maria Eugenia |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Nanoparticles Radiation damage TEM |
topic |
Nanoparticles Radiation damage TEM |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
In this work, it is shown that thiol-protected Au nanoparticles (AuNPs@SR) of approximately 3.4 nm size suffered unexpectedly high radiation damage under standard transmission electron microscopy (TEM) operating conditions. For metallic systems (conducting sample), it is expected that the greatest contribution to the damage comes from knock-on displacement, but radiolysis is the most probable radiation damage mechanism for organic samples. The radiation damage of the electron beam produces huge changes in AuNPs' structure, leading to coalescence of the Au cores when their {100} surfaces are facing each other. The complete coalescence process involve thiol desoprtion, AuNPs' reorientation, and surface diffusion of Au adatoms, which produce the oriented attachment of the Au cores. The knock-on displacement cannot explain by itself the time taken by the entire process. Through a rigorous analysis, we rationalize the results considering that because of the small size of AuNPs they have a lower electron density than the bulk material which favors radiolytic damage. Fil: Azcárate, Julio César. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina Fil: Fonticelli, Mariano Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina Fil: Zelaya, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina |
description |
In this work, it is shown that thiol-protected Au nanoparticles (AuNPs@SR) of approximately 3.4 nm size suffered unexpectedly high radiation damage under standard transmission electron microscopy (TEM) operating conditions. For metallic systems (conducting sample), it is expected that the greatest contribution to the damage comes from knock-on displacement, but radiolysis is the most probable radiation damage mechanism for organic samples. The radiation damage of the electron beam produces huge changes in AuNPs' structure, leading to coalescence of the Au cores when their {100} surfaces are facing each other. The complete coalescence process involve thiol desoprtion, AuNPs' reorientation, and surface diffusion of Au adatoms, which produce the oriented attachment of the Au cores. The knock-on displacement cannot explain by itself the time taken by the entire process. Through a rigorous analysis, we rationalize the results considering that because of the small size of AuNPs they have a lower electron density than the bulk material which favors radiolytic damage. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-19 |
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/11336/70478 Azcárate, Julio César; Fonticelli, Mariano Hernan; Zelaya, Maria Eugenia; Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis; American Chemical Society; Journal of Physical Chemistry C; 121; 46; 19-11-2017; 26108-26116 1932-7447 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/70478 |
identifier_str_mv |
Azcárate, Julio César; Fonticelli, Mariano Hernan; Zelaya, Maria Eugenia; Radiation Damage Mechanisms of Monolayer-Protected Nanoparticles via TEM Analysis; American Chemical Society; Journal of Physical Chemistry C; 121; 46; 19-11-2017; 26108-26116 1932-7447 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.acs.org/doi/10.1021/acs.jpcc.7b08525 info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.jpcc.7b08525 |
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 |
dc.publisher.none.fl_str_mv |
American Chemical Society |
publisher.none.fl_str_mv |
American Chemical Society |
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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1844613448445460480 |
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13.070432 |