Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution

Hybrid nanoparticles allow exploiting the interplay of confinement, proximity between different materials and interfacial effects. However, to harness their properties an in-depth understanding of their (meta)stability and interfacial characteristics is crucial. This is especially the case of nanosy...

Descripción completa

Detalles Bibliográficos
Autores: Roldán Gutiérrez, Manuel A., Mayence, Arnaud, López Ortega, Alberto, Ishikawa, Ryo, Salafranca, Juan, Estrader, Marta, Salazar Álvarez, Germán, Baro, M. Dolors, Nogués, Josep, Pennycook, Stephen J., Varela Del Arco, María
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/8008
Acceso en línea:https://hdl.handle.net/20.500.14352/8008
Access Level:acceso abierto
Palabra clave:538.9
Magnetic oxides
Core-shell nanoparticles
Scanning transmission electron microscopy
In-situ transformations
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
id ES_c1293bc1a8682dbf8a02ef94cc89ebab
oai_identifier_str oai:docta.ucm.es:20.500.14352/8008
network_acronym_str ES
network_name_str España
repository_id_str
spelling Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolutionRoldán Gutiérrez, Manuel A.Mayence, ArnaudLópez Ortega, AlbertoIshikawa, RyoSalafranca, JuanEstrader, MartaSalazar Álvarez, GermánBaro, M. DolorsNogués, JosepPennycook, Stephen J.Varela Del Arco, María538.9Magnetic oxidesCore-shell nanoparticlesScanning transmission electron microscopyIn-situ transformationsFísica de materialesFísica del estado sólido2211 Física del Estado SólidoHybrid nanoparticles allow exploiting the interplay of confinement, proximity between different materials and interfacial effects. However, to harness their properties an in-depth understanding of their (meta)stability and interfacial characteristics is crucial. This is especially the case of nanosystems based on functional oxides working under reducing conditions, which may severely impact their properties. In this work, the in-situ electron-induced selective reduction of Mn_3O_4 to MnO is studied in magnetic Fe_3O_4/Mn_3O_4 and Mn_3O_4/Fe_3O_4 core/ shell nanoparticles by means of high-resolution scanning transmission electron microscopy combined with electron energy-loss spectroscopy. Such in-situ transformation allows mimicking the actual processes in operando environments. A multi-stage image analysis using geometric phase analysis combined with particle image velocity enables direct monitoring of the relationship between structure, chemical composition and strain relaxation during the Mn_3O_4 reduction. In the case of Fe3O4/Mn_3O_4 core/shell the transformation occurs smoothly without the formation of defects. However, for the inverse Mn_3O_4/Fe_3O_4 core/shell configuration the electron beam-induced transformation occurs in different stages that include redox reactions and void formation followed by strain field relaxation via formation of defects. This study highlights the relevance of understanding the local dynamics responsible for changes in the particle composition in order to control stability and, ultimately, macroscopic functionality.Elsevier B. V.Universidad Complutense de Madrid20212021-02-0120212021-02-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/8008reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/80082026-06-02T12:44:21Z
dc.title.none.fl_str_mv Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
title Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
spellingShingle Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
Roldán Gutiérrez, Manuel A.
538.9
Magnetic oxides
Core-shell nanoparticles
Scanning transmission electron microscopy
In-situ transformations
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
title_short Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
title_full Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
title_fullStr Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
title_full_unstemmed Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
title_sort Probing the meta-stability of oxide core/shell nanoparticle systems at atomic resolution
dc.creator.none.fl_str_mv Roldán Gutiérrez, Manuel A.
Mayence, Arnaud
López Ortega, Alberto
Ishikawa, Ryo
Salafranca, Juan
Estrader, Marta
Salazar Álvarez, Germán
Baro, M. Dolors
Nogués, Josep
Pennycook, Stephen J.
Varela Del Arco, María
author Roldán Gutiérrez, Manuel A.
author_facet Roldán Gutiérrez, Manuel A.
Mayence, Arnaud
López Ortega, Alberto
Ishikawa, Ryo
Salafranca, Juan
Estrader, Marta
Salazar Álvarez, Germán
Baro, M. Dolors
Nogués, Josep
Pennycook, Stephen J.
Varela Del Arco, María
author_role author
author2 Mayence, Arnaud
López Ortega, Alberto
Ishikawa, Ryo
Salafranca, Juan
Estrader, Marta
Salazar Álvarez, Germán
Baro, M. Dolors
Nogués, Josep
Pennycook, Stephen J.
Varela Del Arco, María
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 538.9
Magnetic oxides
Core-shell nanoparticles
Scanning transmission electron microscopy
In-situ transformations
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
topic 538.9
Magnetic oxides
Core-shell nanoparticles
Scanning transmission electron microscopy
In-situ transformations
Física de materiales
Física del estado sólido
2211 Física del Estado Sólido
description Hybrid nanoparticles allow exploiting the interplay of confinement, proximity between different materials and interfacial effects. However, to harness their properties an in-depth understanding of their (meta)stability and interfacial characteristics is crucial. This is especially the case of nanosystems based on functional oxides working under reducing conditions, which may severely impact their properties. In this work, the in-situ electron-induced selective reduction of Mn_3O_4 to MnO is studied in magnetic Fe_3O_4/Mn_3O_4 and Mn_3O_4/Fe_3O_4 core/ shell nanoparticles by means of high-resolution scanning transmission electron microscopy combined with electron energy-loss spectroscopy. Such in-situ transformation allows mimicking the actual processes in operando environments. A multi-stage image analysis using geometric phase analysis combined with particle image velocity enables direct monitoring of the relationship between structure, chemical composition and strain relaxation during the Mn_3O_4 reduction. In the case of Fe3O4/Mn_3O_4 core/shell the transformation occurs smoothly without the formation of defects. However, for the inverse Mn_3O_4/Fe_3O_4 core/shell configuration the electron beam-induced transformation occurs in different stages that include redox reactions and void formation followed by strain field relaxation via formation of defects. This study highlights the relevance of understanding the local dynamics responsible for changes in the particle composition in order to control stability and, ultimately, macroscopic functionality.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-02-01
2021
2021-02-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/8008
url https://hdl.handle.net/20.500.14352/8008
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B. V.
publisher.none.fl_str_mv Elsevier B. V.
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869418536952135680
score 15,300724

Similares en LA Referencia