Size-selective breaking of the core-shell structure of gallium nanoparticles
Entity
UAM. Departamento de Física AplicadaPublisher
IOP PublishingDate
2018-06-26Citation
10.1088/1361-6528/aacb91
Nanotechnology 29.35 (2018): 355707
ISSN
0957-4484 (print); 1361-6528 (online)DOI
10.1088/1361-6528/aacb91Funded by
The research is supported by the MINECO (CTQ2014-53334-C2-2-R, CTQ2017-84309-C2-2-R, MAT2016-80394-R, MAT 2015-65274-R/FEDER and MAT2017-85089-C2-1-R) and Comunidad de Madrid (NANOAVANSENS ref. S2013/MIT-3029) projects. ARC acknowledges Ramón y Cajal program (under contract number RYC-2015-18047). FN acknowledges support from Marie Sklodowska-Curie grant agreement No. 641899 from the European Union´s Horizon 2020 research and innovation programmeProject
Gobierno de España. CTQ2014-53334-C2-2-R; Gobierno de España. CTQ2017-84309-C2-2-R; Gobierno de España. MAT2016-80394-R; Gobierno de España. MAT 2015-65274-R/FEDER; Gobierno de España. MAT2017-85089-C2-1-R; Comunidad de Madrid. S2013/MIT-3029/NANOAVANSENS; info:eu-repo/grantAgreement/EC/H2020/641899/EU//PROMISEditor's Version
https://doi.org/10.1088/1361-6528/aacb91Subjects
Core-shell; Ellipsometry; Thermal stability; Plasmonics; Oxidation; Nanoparticles; Gallium; Ellipsometry; FísicaNote
This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered toRights
© 2018 IOP Publishing Ltd
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
Core-shell gallium nanoparticles (Ga NPs) have recently been proposed as an ultraviolet plasmonic material for different applications but only at room temperature. Here, the thermal stability as a function of the size of the NPs is reported over a wide range of temperatures. We analyze the chemical and structural properties of the oxide shell by x-ray photoelectron spectroscopy and atomic force microscopy. We demonstrate the inverse dependence of the shell breaking temperature with the size of the NPs. Spectroscopic ellipsometry is used for tracking the rupture and its mechanism is systematically investigated by scanning electron microscopy, grazing incidence x-ray diffraction and cathodoluminescence. Taking advantage of the thermal stability of the NPs, we perform complete oxidations that lead to homogenous gallium oxide NPs. Thus, this study set the physical limits of Ga NPs to last at high temperatures, and opens up the possibility to achieve totally oxidized NPs while keeping their sphericity
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Google Scholar:Catalán-Gómez, S.
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Redondo-Cubero, A.
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Palomares, F. J.
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Vázquez, L.
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Nogales, E.
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Nucciarelli, F.
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Méndez, B.
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Gordillo García, Nuria
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Pau Vizcaíno, José Luis
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