Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/199118
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Combining X-ray whole powder pattern modeling, rietveld and pair distribution function analyses as a novel bulk approach to study interfaces in heteronanostructures: Oxidation front in FeO/Fe3O4 core/shell nanoparticles as a case study |
Autor: | Ichikawa, Rodrigo U.; Roca, Alejandro G. CSIC ORCID; López-Ortega, Alberto CSIC ORCID; Estrader, Marta CSIC ORCID; Peral, Inmaculada; Turrillas, Xabier M. CSIC ORCID ; Nogués, Josep CSIC ORCID | Fecha de publicación: | 2018 | Editor: | Wiley-VCH | Citación: | Small 14(30): 1800804 (2018) | Resumen: | Understanding the microstructure in heterostructured nanoparticles is crucial to harnessing their properties. Although microscopy is ideal for this purpose, it allows for the analysis of only a few nanoparticles. Thus, there is a need for structural methods that take the whole sample into account. Here, a novel bulk‐approach based on the combined analysis of synchrotron X‐ray powder diffraction with whole powder pattern modeling, Rietveld and pair distribution function is presented. The microstructural temporal evolution of FeO/Fe3O4 core/shell nanocubes is studied at different time intervals. The results indicate that a two‐phase approach (FeO and Fe3O4) is not sufficient to successfully fit the data and two additional interface phases (FeO and Fe3O4) are needed to obtain satisfactory fits, i.e., an onion‐type structure. The analysis shows that the Fe3O4 phases grow to some extent (≈1 nm) at the expense of the FeO core. Moreover, the FeO core progressively changes its stoichiometry to accommodate more oxygen. The temporal evolution of the parameters indicates that the structure of the FeO/Fe3O4 nanocubes is rather stable, although the exact interface structure slightly evolves with time. This approach paves the way for average studies of interfaces in different kinds of heterostructured nanoparticles, particularly in cases where spectroscopic methods have some limitations. | Versión del editor: | https://doi.org/10.1002/smll.201800804 | URI: | http://hdl.handle.net/10261/199118 | DOI: | 10.1002/smll.201800804 | ISSN: | 1613-6810 | E-ISSN: | 1613-6829 |
Aparece en las colecciones: | (CIN2) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 59,24 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
13
checked on 21-abr-2024
WEB OF SCIENCETM
Citations
16
checked on 23-feb-2024
Page view(s)
187
checked on 24-abr-2024
Download(s)
33
checked on 24-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.