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López-Fernández E, Gil-Rostra J, Espinós JP, González-Elipe AR, de Lucas Consuegra A, Yubero F. Chemistry and Electrocatalytic Activity of Nanostructured Nickel Electrodes for Water Electrolysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00856] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. López-Fernández
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
- Department of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071, Ciudad Real, Spain
| | - J. Gil-Rostra
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - J. P. Espinós
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - A. R. González-Elipe
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - A. de Lucas Consuegra
- Department of Chemical Engineering, School of Chemical Sciences and Technologies, University of Castilla-La Mancha, Avda. Camilo José Cela 12, E-13071, Ciudad Real, Spain
| | - F. Yubero
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
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Pauly N, Yubero F, Espinós JP, Tougaard S. Optical properties and electronic transitions of zinc oxide, ferric oxide, cerium oxide, and samarium oxide in the ultraviolet and extreme ultraviolet. Appl Opt 2017; 56:6611-6621. [PMID: 29047953 DOI: 10.1364/ao.56.006611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Optical properties and electronic transitions of four oxides, namely zinc oxide, ferric oxide, cerium oxide, and samarium oxide, are determined in the ultraviolet and extreme ultraviolet by reflection electron energy loss spectroscopy using primary electron energies in the range 0.3-2.0 keV. This technique allows the evaluation of the optical response in these ultraviolet spectral regions of a thin layer of material, and the analysis is straightforward. It is performed within the dielectric response theory by means of the QUEELS-ε(k, ω)-REELS software developed by Tougaard and Yubero [Surf. Interface Anal.36, 824 (2004)SIANDQ0142-242110.1002/(ISSN)1096-9918]. The method consists basically in the fitting of experimentally determined single-scattering electron energy loss cross sections with a parametric energy loss function of the corresponding material, to the one calculated within a dielectric response formalism. The obtained refractive index and extinction coefficients, as well as the identified electronic transitions are compared, when available, with previously published results.
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Peláez RJ, Espinós JP, Afonso CN. Formation of nitrile species on Ag nanostructures supported on a-Al 2O 3: a new corrosion route for silver exposed to the atmosphere. Nanotechnology 2017; 28:175709. [PMID: 28278132 DOI: 10.1088/1361-6528/aa65c0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The aging of supported Ag nanostructures upon storage in ambient conditions (air and room temperature) for 20 months has been studied. The samples are produced on glass substrates by pulsed laser deposition (PLD); first a 15 nm thick buffer layer of amorphous aluminum oxide (a-Al2O3) is deposited, followed by PLD of Ag. The amount of deposited Ag ranges from that leading to a discontinuous layer up to an almost-percolated layer with a thickness of <6 nm. Some regions of the as-grown silver layers are converted, by laser induced dewetting, into round isolated nanoparticles (NPs) with diameters of up to ∼25 nm. The plasmonic, structural and chemical properties of both as-grown and laser exposed regions upon aging have been followed using extinction spectroscopy, scanning electron microscopy and x-ray photoelectron spectroscopy, respectively. The results show that the discontinuous as-grown regions are optically and chemically unstable and that the metal becomes oxidized faster, the smaller the amount of Ag. The corrosion leads to the formation of nitrile species due to the reaction between NO x species from the atmosphere adsorbed at the surface of Ag, and hydrocarbons adsorbed in defects at the surface of the a-Al2O3 layer during the deposition of the Ag nanostructures by PLD that migrate to the surface of the metal with time. The nitrile formation thus results in the main oxidation mechanism and inhibits almost completely the formation of sulphate/sulphide. Finally, the optical changes upon aging offer an easy-to-use tool for following the aging process. They are dominated by an enhanced absorption in the UV side of the spectrum and a blue-shift of the surface plasmon resonance that are, respectively, related to the formation of a dielectric overlayer on the Ag nanostructure and changes in the dimensions/features of the nanostructures, both due to the oxidation process.
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Affiliation(s)
- R J Peláez
- Laser Processing Group, Instituto de Optica, CSIC, Serrano 121, E-28006, Madrid, Spain
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Rico VJ, Lahoz R, Rey-García F, Yubero F, Espinós JP, de la Fuente GF, González-Elipe AR. Laser Treatment of Nanoparticulated Metal Thin Films for Ceramic Tile Decoration. ACS Appl Mater Interfaces 2016; 8:24880-24886. [PMID: 27556592 DOI: 10.1021/acsami.6b07469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper presents a new method for the fabrication of metal-like decorative layers on glazed ceramic tiles. It consists of the laser treatment of Cu thin films prepared by electron-beam evaporation at glancing angles. A thin film of discontinuous Cu nanoparticles was electron-beam-evaporated in an oblique angle configuration onto ceramic tiles and an ample palette of colors obtained by laser treatment both in air and in vacuum. Scanning electron microscopy along with UV-vis-near-IR spectroscopy and time-of-flight secondary ion mass spectrometry analysis were used to characterize the differently colored layers. On the basis of these analyses, color development has been accounted for by a simple model considering surface melting phenomena and different microstructural and chemical transformations of the outmost surface layers of the samples.
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Affiliation(s)
- V J Rico
- Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad Sevilla , Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | | | - F Rey-García
- Departamento de Física & I3N, Universidade de Aveiro , 3810-193 Aveiro, Portugal
| | - F Yubero
- Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad Sevilla , Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - J P Espinós
- Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad Sevilla , Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | | | - A R González-Elipe
- Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad Sevilla , Avenida Américo Vespucio 49, 41092 Sevilla, Spain
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Peláez RJ, Castelo A, Afonso CN, Borrás A, Espinós JP, Riedel S, Leiderer P, Boneberg J. Enhanced reactivity and related optical changes of Ag nanoparticles on amorphous Al₂O₃ supports. Nanotechnology 2013; 24:365702. [PMID: 23942355 DOI: 10.1088/0957-4484/24/36/365702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Pairs of samples containing Ag nanoparticles (NPs) of different dimensions have been produced under the same conditions but on different substrates, namely standard glass slides and a thin layer of amorphous aluminum oxide (a-Al₂O₃) on-glass. Upon storage in ambient conditions (air and room temperature) the color of samples changed and a blue-shift and damping of the surface plasmon resonance was observed. The changes are weaker for the samples on-glass and tend to saturate after 12 months. In contrast, the changes for the samples on a-Al₂O₃ appear to be still progressing after 25 months. While x-ray photoelectron spectroscopy shows a slight sulfurization and negligible oxidation of the Ag for the on-glass samples upon 25 months aging, it shows that Ag is strongly oxidized for the on a-Al₂O₃ samples and sulfurization is negligible. Both optical and chemical results are consistent with the production of a shell at the expense of a reduction of the metal core dimensions, the latter being responsible for the blue-shift and related to the small (<10 nm initial diameter) of the NPs. The enhanced reactivity of the Ag NPs on the a-Al₂O₃ supports goes along with specific morphological changes of the Ag NPs and the observation of nitrogen.
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Affiliation(s)
- R J Peláez
- Laser Processing Group, Instituto de Optica, CSIC, Serrano 121, E-28006 Madrid, Spain.
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Coll M, Gázquez J, Sandiumenge F, Puig T, Obradors X, Espinós JP, Hühne R. Nanostructural control in solution-derived epitaxial Ce(1-x)Gd(x)O(2-y) films. Nanotechnology 2008; 19:395601. [PMID: 21832597 DOI: 10.1088/0957-4484/19/39/395601] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A novel mechanism based on aliovalent doping, allowing fine tuning of the nanostructure and surface topography of solution-derived ceria films, is reported. While under reducing atmospheric conditions, non-doped ceria films are inherently polycrystalline due to an interstitial amorphous Ce(2)C(3) phase that inhibits grain growth, a high quality epitaxial film can be achieved simply by doping with Gd(3+) cations. Gd(3+) [Formula: see text] Ce(4+) substitutions within the lattice are accompanied by charge-compensating oxygen vacancies throughout the volume of the crystallites acting as an efficient vehicle to reduce the barrier for grain boundary motion caused by interstitial Ce(2)C(3). In this way, the original nanostructure is self-purified by pushing the amorphous Ce(2)C(3) phase towards the free surface of the film. Once a full epitaxial cube-on-cube oriented ceria film is obtained, its surface morphology is dictated by the interplay between faceting on low energy {110} and/or {111} pyramidal planes and truncation of those pyramids by (001) ones. The development of the latter requires the suppression of their polar character which is thought to be achieved by charge compensation between the dopand and oxygen along [Formula: see text] directions.
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Affiliation(s)
- M Coll
- Institut de Ciència de Materials de Barcelona, CSIC Campus de la UAB, E-08193 Bellaterra, Catalonia, Spain
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Mansilla C, Gracia F, Martin-Concepción AI, Espinós JP, Holgado JP, Yubero F, González-Elipe AR. Study of the first nucleation steps of thin films by XPS inelastic peak shape analysis. SURF INTERFACE ANAL 2007. [DOI: 10.1002/sia.2509] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Mansilla C, Yubero F, Zier M, Reiche R, Oswald S, Holgado JP, Espinós JP, González-Elipe AR. First stages of growth of cerium oxide deposited on alumina and reduced titania surfaces. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2269] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Espinós JP, González-Elipe AR, Fernández A, Munuera G. Use of XPS and Ar+depth profiling to determine the dispersion degree of Ni in Ni/TiO2and Ni/SiO2catalysts. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.740190194] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Leinen D, Fernández A, Espinós JP, González-Elipe AR. XPS and ISS study of NiTiO3and PbTiO3subjected to low-energy ion bombardment. I. Influence of the type of ion (Ar+and O 2+). SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.740201203] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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González-Elipe AR, Sanz JM, Espinós JP, Fernandez A, Munuera G. Chemical changes in titanate surfaces induced by Ar+ion bombardment. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.740190154] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Martín-Concepción AI, Yubero F, Espinós JP, Tougaard S. Surface roughness and island formation effects in ARXPS quantification. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.1765] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Espinós JP, Morales J, Barranco A, Caballero A, Holgado JP, González-Elipe AR. Interface Effects for Cu, CuO, and Cu2O Deposited on SiO2 and ZrO2. XPS Determination of the Valence State of Copper in Cu/SiO2 and Cu/ZrO2 Catalysts. J Phys Chem B 2002. [DOI: 10.1021/jp014618m] [Citation(s) in RCA: 478] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. P. Espinós
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
| | - J. Morales
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
| | - A. Barranco
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
| | - A. Caballero
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
| | - J. P. Holgado
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
| | - A. R. González-Elipe
- Instituto de Ciencia de Materiales de Sevilla, Centro de Investigaciones Científicas, Isla de la Cartuja, Avda, Americo Vespucio s/n, 41092 Sevilla, Spain
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Barranco A, Yubero F, Espinós JP, González-Elipe AR. The chemical state vector: a new concept for the characterization of oxide interfaces. SURF INTERFACE ANAL 2001. [DOI: 10.1002/sia.1107] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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López-Carreño LD, Benítez G, Viscido L, Heras JM, Yubero F, Espinós JP, González-Elipe AR. Oxidation of molybdenum surfaces by reactive oxygen plasma and O2+ bombardment: an auger and XPS study. SURF INTERFACE ANAL 1998. [DOI: 10.1002/(sici)1096-9918(199804)26:4<235::aid-sia360>3.0.co;2-a] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jiménez VM, Lassaletta G, Fernández A, Espinós JP, González-Elipe AR. Substrate Effects and Chemical State Plots for the XPS Analysis of Supported TiO2 Catalysts. SURF INTERFACE ANAL 1997. [DOI: 10.1002/(sici)1096-9918(199704)25:4<292::aid-sia214>3.0.co;2-d] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Mejías JA, Jiménez VM, Lassaletta G, Fernández A, Espinós JP, A. R. González-Elipe*. Interpretation of the Binding Energy and Auger Parameter Shifts Found by XPS for TiO2 Supported on Different Surfaces. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp960988c] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. A. Mejías
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
| | - V. M. Jiménez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
| | - G. Lassaletta
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
| | - A. Fernández
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
| | - J. P. Espinós
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
| | - A. R. González-Elipe*
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) and Dpto. Química Inorgánica, P.O. Box 1115, 41080 Sevilla, Spain
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Fernández A, Espinós JP, Leinen D, González-Elipe AR, Sanz JM. Charging and mixing effects during the XPS analysis of mixtures of oxides. SURF INTERFACE ANAL 1994. [DOI: 10.1002/sia.740220127] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Caballero A, Leinen D, Espinós JP, Fernández A, González-Elipe AR. Use of XAS and chemical probes to study the structural damage induced in oxide ceramics by bombardment with low-energy ions. SURF INTERFACE ANAL 1994. [DOI: 10.1002/sia.740210617] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Munuera G, González-Elipe AR, Fernández A, Malet P, Espinós JP. Spectroscopic characterisation and photochemical behaviour of a titanium hydroxyperoxo compound. ACTA ACUST UNITED AC 1989. [DOI: 10.1039/f19898501279] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Muñoz A, Munuera G, Malet P, González-Elipe AR, Espinós JP. XPS and TRP/TPO Study of the behaviour of rhodium particles supported on TiO2. SURF INTERFACE ANAL 1988. [DOI: 10.1002/sia.740120404] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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