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Lahoz F, de Armas-Rillo S, Hernández-Rodríguez C, Gil-Rostra J, Yubero F. Optical monitoring of detergent pollutants in greywater. Opt Express 2023; 31:15227-15238. [PMID: 37157630 DOI: 10.1364/oe.466194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Large amount of wastewater is produced by washing machines and dishwashers, which are used in a daily basis. This domestic wastewater generated in households or office buildings (also called greywater) is drained directly to the drainpipes without differentiation from that with fecal contamination from toilets. Detergents are arguably the pollutants most frequently found in greywater from home appliances. Their concentrations vary in the successive stages in a wash cycle, which could be taken into account in a rational design of home appliances wastewater management. Analytical chemistry procedures are commonly used to determine the pollutant content in wastewater. They require collecting samples and their transport to properly equipped laboratories, which hampers real time wastewater management. In this paper, optofluidic devices based on planar Fabry-Perot microresonators operating in transmission mode in the visible and near infrared spectral ranges have been studied to determine the concentration of five brands of soap dissolved in water. It is found that the spectral positions of the optical resonances redshift when the soap concentration increases in the corresponding solutions. Experimental calibration curves of the optofluidic device were used to determine the soap concentration of wastewater from the successive stages of a washing machine wash cycle either loaded with garments or unloaded. Interestingly, the analysis of the optical sensor indicated that the greywater from the last water discharge of the wash cycle could be reused for gardening or agriculture. The integration of this kind of microfluidic devices into the home appliances design could lead to reduce our hydric environmental impact.
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Pauly N, Yubero F, Tougaard S. Determination of the Primary Excitation Spectra in XPS and AES. Nanomaterials (Basel) 2023; 13:339. [PMID: 36678092 PMCID: PMC9865875 DOI: 10.3390/nano13020339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
This paper reviews a procedure that allows for extracting primary photoelectron or Auger electron emissions from homogeneous isotropic samples. It is based on a quantitative dielectric description of the energy losses of swift electrons travelling nearby surfaces in presence of stationary positive charges. The theory behind the modeling of the electron energy losses, implemented in a freely available QUEELS-XPS software package, takes into account intrinsic and extrinsic effects affecting the electron transport. The procedure allows for interpretation of shake-up and multiplet structures on a quantitative basis. We outline the basic theory behind it and illustrate its capabilities with several case examples. Thus, we report on the angular dependence of the intrinsic and extrinsic Al 2s photoelectron emission from aluminum, the shake-up structure of the Ag 3d, Cu 2p, and Ce 3d photoelectron emission from silver, CuO and CeO2, respectively, and the quantification of the two-hole final states contributing to the L3M45M45 Auger electron emission of copper. These examples illustrate the procedure, that can be applied to any homogeneous isotropic material.
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Affiliation(s)
- Nicolas Pauly
- Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), 50 av. F. D. Roosevelt, B-1050 Brussels, Belgium
| | - Francisco Yubero
- Institute of Materials Science of Sevilla (CSIC–Univ. Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Sven Tougaard
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense, Denmark
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3
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Rico VJ, Turk H, Yubero F, Gonzalez-Elipe AR. Titania Enhanced Photocatalysis and Dye Giant Absorption in Nanoporous 1D Bragg Microcavities. ACS Appl Nano Mater 2022; 5:5487-5497. [PMID: 35492435 PMCID: PMC9040112 DOI: 10.1021/acsanm.2c00477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Light trapping effects are known to boost the photocatalytic degradation of organic molecules in 3D photonic structures of anatase titania (a-TiO2) with an inverse opal configuration. In the present work, we show that photocatalytic activity can also be enhanced in a-TiO2 thin films if they are incorporated within a nanoporous 1D optical resonant microcavity. We have designed and manufactured multilayer systems that, presenting a high open porosity to enable a straightforward diffusion of photodegradable molecules, provide light confinement effects at wavelengths around the absorption edge of photoactive a-TiO2. In brief, we have observed that a nanoporous 1D Bragg microcavity prepared by electron beam evaporation at oblique angles comprising a central defect layer of nanoporous a-TiO2 boosts the photocatalytic degradation of nitrobenzene and methyl orange dye solutions. The multilayer structure of the microcavity was designed to ensure the appearance of optical resonances at the a-TiO2 layer location and wavelengths around the absorption onset of this semiconductor. In this porous 1D Bragg microcavity, the diffusion constraints of molecules through the capping layers covering the a-TiO2 are effectively compensated by an increase in the photocatalytic activity due to the light confinement phenomena. We also report that the absorption coefficient of methyl orange dye solution infiltrated within the pore structure of the microcavity is exalted at the wavelengths of the corresponding optical resonances. This effect gives rise to a small but non-negligible visible light photodegradation of dye molecules. The possibilities of tailoring the design of 1D photonic systems to boost the photocatalytic activity of a-TiO2 are discussed.
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Tougaard S, Pauly N, Yubero F. QUEELS: Software to calculate the energy loss processes in TEELS, REELS, XPS, and AES including effects of the core hole. SURF INTERFACE ANAL 2022. [DOI: 10.1002/sia.7095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- S. Tougaard
- Department of Physics, Chemistry and Pharmacy University of Southern Denmark Odense M Denmark
| | - N. Pauly
- Université libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84) Brussels Belgium
| | - F. Yubero
- Instituto de Ciencia de Materiales de Sevilla, Univ. Sevilla ‐ CSIC Sevilla Spain
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Mogni E, Pellegrini G, Gil-Rostra J, Yubero F, Simone G, Fossati S, Dostálek J, Martinez-Vazquez R, Osellame R, Celebrano M, Finazzi M, Biagioni P. One-dimensional photonic crystal for polarization-sensitive surface-enhanced spectroscopy. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226606009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
We realize and experimentally characterize a novel platform for surface-enhanced sensing through Bloch Surface Waves (BSWs). We test a one-dimensional photonic crystal, with a high index inclusion in the top layer, that sustains surfaces modes with, in principle, arbitrary polarization. This is achieved through the coherent superposition of TE and TM dispersion relations of BSWs, which can also provide superchiral fields over a wide spectral range (down to the UV). The resulting platform paves the way to the implementation of polarization-resolved surface-enhanced techniques.
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López-Fernández E, Sacedón CG, Gil-Rostra J, Yubero F, González-Elipe AR, de Lucas-Consuegra A. Recent Advances in Alkaline Exchange Membrane Water Electrolysis and Electrode Manufacturing. Molecules 2021; 26:6326. [PMID: 34770735 PMCID: PMC8587517 DOI: 10.3390/molecules26216326] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 11/18/2022] Open
Abstract
Water electrolysis to obtain hydrogen in combination with intermittent renewable energy resources is an emerging sustainable alternative to fossil fuels. Among the available electrolyzer technologies, anion exchange membrane water electrolysis (AEMWE) has been paid much attention because of its advantageous behavior compared to other more traditional approaches such as solid oxide electrolyzer cells, and alkaline or proton exchange membrane water electrolyzers. Recently, very promising results have been obtained in the AEMWE technology. This review paper is focused on recent advances in membrane electrode assembly components, paying particular attention to the preparation methods for catalyst coated on gas diffusion layers, which has not been previously reported in the literature for this type of electrolyzers. The most successful methodologies utilized for the preparation of catalysts, including co-precipitation, electrodeposition, sol-gel, hydrothermal, chemical vapor deposition, atomic layer deposition, ion beam sputtering, and magnetron sputtering deposition techniques, have been detailed. Besides a description of these procedures, in this review, we also present a critical appraisal of the efficiency of the water electrolysis carried out with cells fitted with electrodes prepared with these procedures. Based on this analysis, a critical comparison of cell performance is carried out, and future prospects and expected developments of the AEMWE are discussed.
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Affiliation(s)
- Ester López-Fernández
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-University Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain; (J.G.-R.); (F.Y.); (A.R.G.-E.)
- 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;
| | - Celia Gómez Sacedón
- 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;
| | - Jorge Gil-Rostra
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-University Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain; (J.G.-R.); (F.Y.); (A.R.G.-E.)
| | - Francisco Yubero
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-University Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain; (J.G.-R.); (F.Y.); (A.R.G.-E.)
| | - Agustín R. González-Elipe
- Laboratory of Nanotechnology on Surfaces and Plasma, Institute of Materials Science of Seville (CSIC-University Sevilla), Av. Américo Vespucio 49, E-41092 Sevilla, Spain; (J.G.-R.); (F.Y.); (A.R.G.-E.)
| | - Antonio 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;
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7
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Castillo-Seoane J, Gil-Rostra J, López-Flores V, Lozano G, Javier Ferrer F, Espinós JP, Ostrikov K(K, Yubero F, González-Elipe AR, Barranco Á, Sánchez-Valencia JR, Borrás A. One-reactor vacuum and plasma synthesis of transparent conducting oxide nanotubes and nanotrees: from single wire conductivity to ultra-broadband perfect absorbers in the NIR. Nanoscale 2021; 13:13882-13895. [PMID: 34477662 PMCID: PMC8374677 DOI: 10.1039/d1nr01937f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
The eventual exploitation of one-dimensional nanomaterials needs the development of scalable, high yield, homogeneous and environmentally friendly methods capable of meeting the requirements for fabrication of functional nanomaterials with properties on demand. In this article, we demonstrate a vacuum and plasma one-reactor approach for the synthesis of fundamental common elements in solar energy and optoelectronics, i.e. the transparent conducting electrode but in the form of nanotube and nanotree architectures. Although the process is generic and can be used for a variety of TCOs and wide-bandgap semiconductors, we focus herein on indium doped tin oxide (ITO) as the most previously researched in previous applications. This protocol combines widely applied deposition techniques such as thermal evaporation for the formation of organic nanowires serving as 1D and 3D soft templates, deposition of polycrystalline layers by magnetron sputtering, and removal of the templates by simply annealing under mild vacuum conditions. The process variables are tuned to control the stoichiometry, morphology, and alignment of the ITO nanotubes and nanotrees. Four-probe characterization reveals the improved lateral connectivity of the ITO nanotrees and applied on individual nanotubes shows resistivities as low as 3.5 ± 0.9 × 10-4Ω cm, a value comparable to that of single-crystalline counterparts. The assessment of diffuse reflectance and transmittance in the UV-Vis range confirms the viability of the supported ITO nanotubes as random optical media working as strong scattering layers. Their further ability to form ITO nanotrees opens a path for practical applications as ultra-broadband absorbers in the NIR. The demonstrated low resistivity and optical properties of these ITO nanostructures open a way for their use in LEDs, IR shields, energy harvesting, nanosensors, and photoelectrochemical applications.
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Affiliation(s)
- Javier Castillo-Seoane
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
- Departamento de Física Atómica, Molecular y Nuclear (Universidad de Sevilla)Avda. Reina MercedesSeville E-41012Spain
| | - Jorge Gil-Rostra
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Víctor López-Flores
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Gabriel Lozano
- Multifunctional Optical Materials Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - F. Javier Ferrer
- Centro Nacional de Aceleradores (Universidad de Sevilla, Consejo Superior de Investigaciones Científicas (CSIC) and Junta de Andalucía)Av. Thomas A. Edison 7Seville E-41092Spain
| | - Juan P. Espinós
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Kostya (Ken) Ostrikov
- School of Chemistry and Physics, Queensland University of TechnologyBrisbaneQLD 4000Australia
- CSIRO-QUT Joint Sustainable Processes and Devices LaboratoryLindfieldNSW 2070Australia
| | - Francisco Yubero
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Agustín R. González-Elipe
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Ángel Barranco
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
| | - Juan R. Sánchez-Valencia
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
- Departamento de Física Atómica, Molecular y Nuclear (Universidad de Sevilla)Avda. Reina MercedesSeville E-41012Spain
| | - Ana Borrás
- Nanotechnology on Surfaces and Plasma Group, Materials Science Institute of Seville (ICMS), (Consejo Superior de Investigaciones Científicas (CSIC) – Universidad de Sevilla)C/Américo Vespucio 49Seville E-41092Spain
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8
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Oliva-Ramírez M, López-Santos C, Berthon H, Goven M, Pórtoles J, Gil-Rostra J, González-Elipe AR, Yubero F. Form Birefringence in Resonant Transducers for the Selective Monitoring of VOCs under Ambient Conditions. ACS Appl Mater Interfaces 2021; 13:19148-19158. [PMID: 33856758 DOI: 10.1021/acsami.1c02499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this work, we have developed a new kind of nanocolumnar birefringent Bragg microcavity (BBM) that, tailored by oblique angle deposition, behaves as a selective transducer of volatile organic compounds (VOCs). Unlike the atomic lattice origin of birefringence in anisotropic single crystals, in the BBM, it stems from an anisotropic self-organization at the nanoscale of the voids and structural elements of the layers. The optical adsorption isotherms recorded upon exposure of these nanostructured systems to water vapor and VOCs have revealed a rich yet unexplored phenomenology linked to their optical activity that provides both capacity for vapor identification and partial pressure determination. This photonic response has been reproduced with a theoretical model accounting for the evolution of the form birefringence of the individual layers upon vapor condensation in nanopores and internanocolumnar voids. BBMs that repel water vapor but are accessible to VOCs have been also developed through grafting of their internal surfaces with perfluorooctyltriethoxysilane molecules. These nanostructured photonic systems are proposed for the development of transducers that, operating under environmental conditions, may respond specifically to VOCs without any influence by the degree of humidity of the medium.
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Affiliation(s)
- Manuel Oliva-Ramírez
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - Carmen López-Santos
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - Hermine Berthon
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - Mathilde Goven
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - José Pórtoles
- NEXUS Nanolab, Newcastle University, G8 XPS laboratory Stephenson Building, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Jorge Gil-Rostra
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - Agustín R González-Elipe
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
| | - Francisco Yubero
- Instituto de Ciencia de Materiales de Sevilla (CSIC, University of Seville), CICCartuja, Avda. Américo Vespucio 49, E-41092 Seville, Spain
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Pauly N, Yubero F, Tougaard S. Optical properties of molybdenum in the ultraviolet and extreme ultraviolet by reflection electron energy loss spectroscopy. Appl Opt 2020; 59:4527-4532. [PMID: 32400432 DOI: 10.1364/ao.391014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
Optical properties of polycrystalline molybdenum are determined from ultraviolet up to extreme ultraviolet by reflection electron energy loss spectroscopy (REELS). Calculations are performed within the dielectric response theory by means of the quantitative analysis of electron energy losses at surfaces QUEELS-ϵ(k,ω)-REELS software [Surf. Interface Anal.36, 824 (2004)SIANDQ0142-242110.1002/sia.1774] that allows the simulation of inelastic scattering cross sections, using a parametric energy loss function describing the optical response of the material. From this energy loss function, the real and imaginary parts of the dielectric function, the refractive index, and the extinction coefficient are deduced and compared with previously published results.
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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. XPS primary excitation spectra of Zn 2
p
, Fe 2
p
, and Ce 3
d
from ZnO, α‐Fe
2
O
3
, and CeO
2. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6587] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Nicolas Pauly
- Université libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84) Brussels Belgium
| | - Francisco Yubero
- Instituto de Ciencia de Materiales de Sevilla Univ. Sevilla—CSIC Sevilla Spain
| | - Juan Pedro Espinós
- Instituto de Ciencia de Materiales de Sevilla Univ. Sevilla—CSIC Sevilla Spain
| | - Sven Tougaard
- Department of Physics, Chemistry and Pharmacy University of Southern Denmark Odense Denmark
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12
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Affiliation(s)
- N. Pauly
- Service de Métrologie Nucléaire (CP 165/84); Université libre de Bruxelles; 50 av. F. D. Roosevelt, B-1050 Brussels Belgium
| | - F. Yubero
- Instituto de Ciencia de Materiales de Sevilla, Univ. Sevilla - CSIC; av. Américo Vespucio 49, E-41092 Sevilla Spain
| | - S. Tougaard
- Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; DK-5230 Odense M Denmark
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13
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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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14
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Gil-Rostra J, Ferrer FJ, Espinós JP, González-Elipe AR, Yubero F. Energy-Sensitive Ion- and Cathode-Luminescent Radiation-Beam Monitors Based on Multilayer Thin-Film Designs. ACS Appl Mater Interfaces 2017; 9:16313-16320. [PMID: 28436216 DOI: 10.1021/acsami.7b01175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A multilayer luminescent design concept is presented to develop energy-sensitive radiation-beam monitors on the basis of colorimetric analysis. Each luminescent layer within the stack consists of rare-earth-doped transparent oxides of optical quality and a characteristic luminescent emission under excitation with electron or ion beams. For a given type of particle beam (electron, protons, α particles, etc.), its penetration depth and therefore its energy loss at a particular buried layer within the multilayer stack depend on the energy of the initial beam. The intensity of the luminescent response of each layer is proportional to the energy deposited by the radiation beam within the layer, so characteristic color emission will be achieved if different phosphors are considered in the layers of the luminescent stack. Phosphor doping, emission efficiency, layer thickness, and multilayer structure design are key parameters relevant to achieving a broad colorimetric response. Two case examples are designed and fabricated to illustrate the capabilities of these new types of detector to evaluate the kinetic energy of either electron beams of a few kilo-electron volts or α particles of a few mega-electron volts.
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Affiliation(s)
- Jorge Gil-Rostra
- Instituto de Ciencia de Materiales de Sevilla, (CSIC, Universidad de Sevilla), CICCartuja , Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Francisco J Ferrer
- Centro Nacional de Aceleradores, (CSIC, Universidad de Sevilla) , Av. Thomas A. Edison 7, E-41092 Sevilla, Spain
| | - Juan Pedro Espinós
- Instituto de Ciencia de Materiales de Sevilla, (CSIC, Universidad de Sevilla), CICCartuja , Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Agustín R González-Elipe
- Instituto de Ciencia de Materiales de Sevilla, (CSIC, Universidad de Sevilla), CICCartuja , Av. Américo Vespucio 49, E-41092 Sevilla, Spain
| | - Francisco Yubero
- Instituto de Ciencia de Materiales de Sevilla, (CSIC, Universidad de Sevilla), CICCartuja , Av. Américo Vespucio 49, E-41092 Sevilla, Spain
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Yubero F. SURVEY OF THE USE OF ENZYMES IN THE PARAGUAYAN INDUSTRY AND ITS APPLICATION IN THE PRODUCTION OF ANIMAL FEED. Compend cienc vet 2016. [DOI: 10.18004/compend.cienc.vet.2016.06.31-34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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16
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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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17
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Lahoz F, Martín IR, Gil-Rostra J, Oliva-Ramirez M, Yubero F, Gonzalez-Elipe AR. Portable IR dye laser optofluidic microresonator as a temperature and chemical sensor. Opt Express 2016; 24:14383-14392. [PMID: 27410592 DOI: 10.1364/oe.24.014383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A compact and portable optofluidic microresonator has been fabricated and characterized. It is based on a Fabry-Perot microcavity consisting essentially of two tailored dichroic Bragg mirrors prepared by reactive magnetron sputtering deposition. The microresonator has been filled with an ethanol solution of Nile-Blue dye. Infrared laser emission has been measured with a pump threshold as low as 0.12 MW/cm2 and an external energy conversion efficiency of 41%. The application of the device as a temperature and a chemical sensor is demonstrated. Small temperature variations as well as small amount of water concentrations in the liquid laser medium are detected as a shift of the resonant laser modes.
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Garcia-Garcia F, Salazar P, Yubero F, González-Elipe A. Non-enzymatic Glucose electrochemical sensor made of porous NiO thin films prepared by reactive magnetron sputtering at oblique angles. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.03.193] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Oliva-Ramirez M, Barranco A, Löffler M, Yubero F, González-Elipe AR. Optofluidic Modulation of Self-Associated Nanostructural Units Forming Planar Bragg Microcavities. ACS Nano 2016; 10:1256-1264. [PMID: 26653767 DOI: 10.1021/acsnano.5b06625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Bragg microcavities (BMs) formed by the successive stacking of nanocolumnar porous SiO2 and TiO2 layers with slanted, zigzag, chiral, and vertical configurations are prepared by physical vapor deposition at oblique angles while azimuthally varying the substrate orientation during the multilayer growth. The slanted and zigzag BMs act as wavelength-selective optical retarders when they are illuminated with linearly polarized light, while no polarization dependence is observed for the chiral and vertical cavities. This distinct optical behavior is attributed to a self-nanostructuration mechanism involving a fence-bundling association of nanocolumns as observed by focused ion beam scanning electron microscopy in the slanted and zigzag microcavities. The outstanding retarder response of the optically active BMs can be effectively modulated by dynamic infiltration of nano- and mesopores with liquids of different refraction indices acting as a switch of the polarization behavior. The unprecedented polarization and tunable optofluidic properties of these nanostructured photonic systems have been successfully simulated with a simple model that assumes a certain birefringence for the individual stacked layers and accounts for the light interference phenomena developed in the BMs. The possibilities of this type of self-arranged nanostructured and optically active BMs for liquid sensing and monitoring applications are discussed.
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Affiliation(s)
- Manuel Oliva-Ramirez
- Laboratory of Nanotechnology on Surfaces, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla) Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Angel Barranco
- Laboratory of Nanotechnology on Surfaces, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla) Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Markus Löffler
- Dresden Center for Nanoanalysis (DCN), TU Dresden , 01062 Dresden, Germany
| | - Francisco Yubero
- Laboratory of Nanotechnology on Surfaces, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla) Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Agustin R González-Elipe
- Laboratory of Nanotechnology on Surfaces, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla) Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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20
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Affiliation(s)
- Rafael Alvarez
- Instituto de Ciencia de Materiales de Sevilla (CSIC - Univ. Sevilla) Av. Américo Vespucio 49; E-41092 Sevilla Spain
| | - Francisco Yubero
- Instituto de Ciencia de Materiales de Sevilla (CSIC - Univ. Sevilla) Av. Américo Vespucio 49; E-41092 Sevilla Spain
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21
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Terriza A, Vilches-Pérez JI, González-Caballero JL, Orden EDL, Yubero F, Barranco A, Gonzalez-Elipe AR, Vilches J, Salido M. Osteoblasts Interaction with PLGA Membranes Functionalized with Titanium Film Nanolayer by PECVD. In vitro Assessment of Surface Influence on Cell Adhesion during Initial Cell to Material Interaction. Materials (Basel) 2014; 7:1687-1708. [PMID: 28788538 PMCID: PMC5453252 DOI: 10.3390/ma7031687] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 02/10/2014] [Accepted: 02/25/2014] [Indexed: 01/05/2023]
Abstract
New biomaterials for Guided Bone Regeneration (GBR), both resorbable and non-resorbable, are being developed to stimulate bone tissue formation. Thus, the in vitro study of cell behavior towards material surface properties turns a prerequisite to assess both biocompatibility and bioactivity of any material intended to be used for clinical purposes. For this purpose, we have developed in vitro studies on normal human osteoblasts (HOB®) HOB® osteoblasts grown on a resorbable Poly (lactide-co-glycolide) (PLGA) membrane foil functionalized by a very thin film (around 15 nm) of TiO2 (i.e., TiO2/PLGA membranes), designed to be used as barrier membrane. To avoid any alteration of the membranes, the titanium films were deposited at room temperature in one step by plasma enhanced chemical vapour deposition. Characterization of the functionalized membranes proved that the thin titanium layer completely covers the PLGA foils that remains practically unmodified in their interior after the deposition process and stands the standard sterilization protocols. Both morphological changes and cytoskeletal reorganization, together with the focal adhesion development observed in HOB osteoblasts, significantly related to TiO2 treated PLGA in which the Ti deposition method described has revealed to be a valuable tool to increase bioactivity of PLGA membranes, by combining cell nanotopography cues with the incorporation of bioactive factors.
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Affiliation(s)
- Antonia Terriza
- Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Americo Vespucio 49, E-41092 Seville, Spain.
| | - José I Vilches-Pérez
- Facultad de Medicina, Universidad de Cádiz, Servicios Centrales de Investigación en Ciencias de la Salud, Dr. Marañon 3. 11002 Cádiz, Spain.
| | - Juan L González-Caballero
- Facultad de Medicina, Universidad de Cádiz, Servicios Centrales de Investigación en Ciencias de la Salud, Dr. Marañon 3. 11002 Cádiz, Spain.
| | - Emilio de la Orden
- Facultad de Medicina, Universidad de Cádiz, Servicios Centrales de Investigación en Ciencias de la Salud, Dr. Marañon 3. 11002 Cádiz, Spain.
| | - Francisco Yubero
- Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Americo Vespucio 49, E-41092 Seville, Spain.
| | - Angel Barranco
- Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Americo Vespucio 49, E-41092 Seville, Spain.
| | - Agustín R Gonzalez-Elipe
- Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avda. Americo Vespucio 49, E-41092 Seville, Spain.
| | - José Vilches
- Facultad de Medicina, Universidad de Cádiz, Servicios Centrales de Investigación en Ciencias de la Salud, Dr. Marañon 3. 11002 Cádiz, Spain.
| | - Mercedes Salido
- Facultad de Medicina, Universidad de Cádiz, Servicios Centrales de Investigación en Ciencias de la Salud, Dr. Marañon 3. 11002 Cádiz, Spain.
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22
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Affiliation(s)
- Nicolas Pauly
- Université Libre de Bruxelles; Service de Métrologie Nucléaire (CP 165/84); 50 Av. F. D. Roosevelt B-1050 Brussels Belgium
| | - Sven Tougaard
- Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; DK-5230 Odense M Denmark
| | - Francisco Yubero
- Instituto de Ciencia de Materiales de Sevilla; CSIC - Univ. Sevilla; Avda. Américo Vespucio 49 E-41092 Sevilla Spain
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23
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Díaz-Fernández D, Méndez J, Yubero F, Domínguez-Cañizares G, Gutiérrez A, Soriano L. Study of the early stages of growth of Co oxides on oxide substrates. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5366] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- D. Díaz-Fernández
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera; Universidad Autónoma de Madrid; Cantoblanco E-28049 Madrid Spain
| | - J. Méndez
- ESISNA, Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC; Cantoblanco E-28049 Madrid Spain
| | - F. Yubero
- Instituto de Ciencia de Materiales de Sevilla, ICMSE (CSIC-US); Avda. Americo Vespuccio 49, Isla de la Cartuja E- 41092 Sevilla Spain
| | - G. Domínguez-Cañizares
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera; Universidad Autónoma de Madrid; Cantoblanco E-28049 Madrid Spain
| | - A. Gutiérrez
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera; Universidad Autónoma de Madrid; Cantoblanco E-28049 Madrid Spain
| | - L. Soriano
- Departamento de Física Aplicada and Instituto de Ciencia de Materiales Nicolás Cabrera; Universidad Autónoma de Madrid; Cantoblanco E-28049 Madrid Spain
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24
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Oliva-Ramirez M, González-García L, Parra-Barranco J, Yubero F, Barranco A, González-Elipe AR. Liquids analysis with optofluidic bragg microcavities. ACS Appl Mater Interfaces 2013; 5:6743-6750. [PMID: 23781881 DOI: 10.1021/am401685r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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
Porous Bragg microcavities formed by stacking a series of porous nanocolumnar layers with alternate low (SiO2) and high (TiO2) refractive index materials have been prepared by physical vapor deposition at glancing angles (GLAD). By strictly controlling the porosity and refractive index of the individual films, as well as the relative orientation of the nanocolumns from one layer to the next, very porous and nondispersive high optical quality microcavities have been manufactured. These photonic structures have been implemented into responsive devices to characterize liquids, mixtures of liquids, or solutions flowing through them. The large displacements observed in the optical spectral features (Bragg reflector gap and resonant peak) of the photonic structures have been quantitatively correlated by optical modeling with the refractive index of the circulating liquids. Experiments carried out with different glucose and NaCl solutions and mixtures of water plus glycerol illustrate the potentialities of these materials to serve as optofluidic devices to determine the concentration of solutions or the proportion of two phases in a liquid mixture.
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Affiliation(s)
- Manuel Oliva-Ramirez
- Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
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25
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Gil-Rostra J, Chaboy J, Yubero F, Vilajoana A, González-Elipe AR. Colored and transparent oxide thin films prepared by magnetron sputtering: the glass blower approach. ACS Appl Mater Interfaces 2013; 5:1967-1976. [PMID: 23432474 DOI: 10.1021/am302778h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This work describes the reactive magnetron sputtering processing at room temperature of several mixed oxide MxSiyOz thin films (M: Fe, Ni, Co, Mo, W, Cu) intended for optical, coloring, and aesthetic applications. Specific colors can be selected by adjusting the plasma gas composition and the Si-M ratio in the magnetron target. The microstructure and chemistry of the films are characterized by a large variety of techniques including X-ray photoemission spectroscopy, X-ray absorption spectroscopy (XAS), and infrared spectroscopy, while their optical properties are characterized by UV-vis transmission and reflection analysis. Particularly, XAS analysis of the M cations in the amorphous thin films has provided valuable information about their chemical state and local structure. It is concluded that the M cations are randomly distributed within the SiO2 matrix and that both the M concentration and its chemical state are the key parameters to control the final color of the films.
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Affiliation(s)
- Jorge Gil-Rostra
- Instituto de Ciencia de Materiales de Sevilla (CSIC-USE), Avda. Américo Vespucio 49, E-41092 Sevilla, Spain
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26
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Terriza A, Díaz-Cuenca A, Yubero F, Barranco A, González-Elipe AR, Gonzalez Caballero JL, Vilches J, Salido M. Light induced hydrophilicity and osteoblast adhesion promotion on amorphous TiO2. J Biomed Mater Res A 2012; 101:1026-35. [PMID: 22965473 DOI: 10.1002/jbm.a.34405] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 07/31/2012] [Accepted: 08/01/2012] [Indexed: 01/10/2023]
Abstract
We have studied the effect of the UV induced superhydrophilic wetting of TiO(2) thin films on the osteoblasts cell adhesion and cytoskeletal organization on its surface. To assess any effect of the photo-catalytic removal of adventitious carbon as a factor for the enhancement of the osteoblast development, 100 nm amorphous TiO(2) thin layers were deposited on polyethylene terephthalate (PET), a substrate well known for its poor adhesion and limited wettability and biocompatibility. The TiO(2) /PET materials were characterized by X-ray photoelectron spectroscopy, and atomic force microscopy and their wetting behavior under light illumination studied by the sessile drop method. The amorphous TiO(2) thin films showed a very poor photo-catalytic activity even if becoming superhydrophilic after illumination. The illuminated samples recovered partially its initial hydrophobic state only after their storage in the dark for more than 20 days. Osteoblasts (HOB) were seeded both on bare PET and on TiO(2) /PET samples immediately after illumination and also after four weeks storage in darkness. Cell attachment was much more efficient on the immediately illuminated TiO(2)/PET samples, with development of focal adhesions and cell traction forces. Although we cannot completely discard some photo-catalytic carbon removal as a factor contributing to this cell enhanced attachment, our photodegradation experiments on amorphous TiO(2) are conclusive to dismiss this effect as the major cause for this behavior.
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Affiliation(s)
- Antonia Terriza
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad Sevilla), Seville, Spain
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Terriza A, Álvarez R, Borrás A, Cotrino J, Yubero F, González-Elipe AR. Roughness assessment and wetting behavior of fluorocarbon surfaces. J Colloid Interface Sci 2012; 376:274-82. [DOI: 10.1016/j.jcis.2012.03.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 02/15/2012] [Accepted: 03/04/2012] [Indexed: 11/26/2022]
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Del Prado G, Terriza A, Ortiz-Pérez A, Molina-Manso D, Mahillo I, Yubero F, Puértolas JA, Manrubia-Cobo M, Gómez Barrena E, Esteban J. DLC coatings for UHMWPE: Relationship between bacterial adherence and surface properties. J Biomed Mater Res A 2012; 100:2813-20. [DOI: 10.1002/jbm.a.34220] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 03/25/2012] [Accepted: 04/04/2012] [Indexed: 01/25/2023]
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Affiliation(s)
- S. Tougaard
- Department of Physics and Chemistry; University of Southern Denmark; DK5230 Odense M Denmark
| | - F. Yubero
- Instituto de Ciencia de Materiales (CSIC - U.Sevilla); E-41092 Sevilla Spain
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30
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Gil-Rostra J, Cano M, Pedrosa JM, Ferrer FJ, García-García F, Yubero F, González-Elipe AR. Electrochromic behavior of W(x)Si(y)O(z) thin films prepared by reactive magnetron sputtering at normal and glancing angles. ACS Appl Mater Interfaces 2012; 4:628-638. [PMID: 22208156 DOI: 10.1021/am2014629] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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
This work reports the synthesis at room temperature of transparent and colored W(x)Si(y)O(z) thin films by magnetron sputtering (MS) from a single cathode. The films were characterized by a large set of techniques including X-ray photoelectron spectroscopy (XPS), Rutherford backscattering spectrometry (RBS), Fourier transform infrared (FT-IR), and Raman spectroscopies. Their optical properties were determined by the analysis of the transmission and reflection spectra. It was found that both the relative amount of tungsten in the W-Si MS target and the ratio O(2)/Ar in the plasma gas were critical parameters to control the blue coloration of the films. The long-term stability of the color, attributed to the formation of a high concentration of W(5+) and W(4+) species, has been related with the formation of W-O-Si bond linkages in an amorphous network. At normal geometry (i.e., substrate surface parallel to the target) the films were rather compact, whereas they were very porous and had less tungsten content when deposited in a glancing angle configuration. In this case, they presented outstanding electrochromic properties characterized by a fast response, a high coloration, a complete reversibility after more than one thousand cycles and a relatively very low refractive index in the bleached state.
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Affiliation(s)
- Jorge Gil-Rostra
- Instituto de Ciencia de Materiales de Sevilla, CSIC-USE, Avenida Américo Vespucio 49, E-41092 Sevilla, Spain
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López-Santos C, Fernández-Gutiérrez M, Yubero F, Vazquez-Lasa B, Cotrino J, González-Elipe A, Román JS. Effects of plasma surface treatments of diamond-like carbon and polymeric substrata on the cellular behavior of human fibroblasts. J Biomater Appl 2011; 27:669-83. [PMID: 22090431 DOI: 10.1177/0885328211422832] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Surface properties play an important role in the functioning of a biomaterial in the biological environment. This work describes the influence of the changes that occurred on diamond-like carbon (DLC) and polymeric substrata by different nitrogen and ammonia plasmas treatments and its effects on the cell proliferation on these materials. All substrata were additionally subjected to the effect of neutral beams of nitrogen atoms and NH species for comparison purposes. Results about the proliferation, viability, and morphology of fibroblasts were correlated with surface chemical composition, surface tension, and topography. It was found that the presence of amine groups on the surface and the surface tension are beneficial factors for the cell growth. Surface roughness in DLC also plays a positive role in favoring cell adhesion and proliferation, but it can be detrimental for some of the treated polymers because of the accumulation of low molecular weight fragments formed as a result of the plasma treatments. Analysis of the overall results for each type of material allowed to define a unique parameter called 'factor of merit' accounting for the influence of the different surface characteristics on the cell deployment, which can be used to predict qualitatively the efficiency for cell growth.
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Affiliation(s)
- Carmen López-Santos
- Institute of Materials Science of Sevilla, CSIC-University of Sevilla, Spain
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Gómez-Barrena E, Esteban J, Molina-Manso D, Adames H, Martínez-Morlanes MJ, Terriza A, Yubero F, Puértolas JA. Bacterial adherence on UHMWPE with vitamin E: an in vitro study. J Mater Sci Mater Med 2011; 22:1701-1706. [PMID: 21574013 DOI: 10.1007/s10856-011-4340-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 05/07/2011] [Indexed: 05/30/2023]
Abstract
Orthopaedic materials may improve its capacity to resist bacterial adherence, and subsequent infection. Our aim was to test the bacterial adherence to alpha-tocopherol (frequently named vitamin E, VE) doped or blended UHMWPE with S. aureus and S. epidermidis, compared to virgin material. Collection strains and clinical strains isolated from patients with orthopaedic infections were used, with the biofilm-developing ability as a covariable. While collection strains showed significantly less adherence to VE-UHMWPE, some clinical strains failed to confirm this effect, leading to the conclusion that VE doped or blended UHMWPE affects the adherence of some S. epidermidis and S. aureus strains, independently of the concentration in use, but the results showed important intraspecies differences and cannot be generalized.
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Affiliation(s)
- E Gómez-Barrena
- Department of Orthopaedic Surgery, Hospital La Paz, Madrid, Spain.
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Oliveros M, González-García L, Mugnaini V, Yubero F, Roques N, Veciana J, González-Elipe AR, Rovira C. Novel guests for porous columnar thin films: the switchable perchlorinated trityl radical derivatives. Langmuir 2011; 27:5098-5106. [PMID: 21438510 DOI: 10.1021/la200470f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
TiO(2) and SiO(2) porous thin films consisting of tilted nanocolumns prepared by glancing angle evaporation (GLAD) have been infiltrated with guest derivatives belonging to the family of perchlorinated trityl radicals, novel guest molecules presenting an open-shell electronic configuration associated with paramagnetism, fluorescence, and electroactivity. The main driving forces for infiltration from aqueous solutions of the carboxylate-substituted radical derivatives are the electrostatic interactions between their negative charge and the net positive charges induced on the film pores. Positive charges on the internal surface of the films were induced by either adjusting the radical solution pH at values lower than the point of zero charge (PZC) of the oxide or passivating the nanocolumns oxide surface with a positively charged aminosilane. The infiltrated composite thin films are robust and easy to handle thanks to the physical protection exerted by the film columns. They also keep the multifunctionality of the used guests, as confirmed by electron paramagnetic resonance (EPR), UV-vis spectroscopy, and fluorescence spectroscopy. To prove the electroactivity of the infiltrated porous films, a porous TiO(2) host layer was supported onto conductive indium tin oxide (ITO). By application of an appropriate redox potential, the guest radical molecules have been reversibly switched from their open-shell electronic configuration to their diamagnetic state and hence changed their optical properties. On the basis of these results, it is herein proposed that the appropriate surface functionalization of the pore internal surface of GLAD thin films can be used to prepare novel radical-oxide composite thin films usable for the development of robust switchable electrically driven photonic and magnetic devices.
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Affiliation(s)
- Malena Oliveros
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus Universitari de la UAB, E-08193, Bellaterra, Spain
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Terriza A, Del Prado G, Pérez AO, Martínez MJ, Puértolas JA, Manso DM, González-Elipe AR, Yubero F, Barrena EG, Esteban J. Bacterial adherence on fluorinated carbon based coatings deposited on polyethylene surfaces. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/252/1/012013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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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Kinnari T, Esteban J, Zamora N, Fernandez R, López-Santos C, Yubero F, Mariscal D, Puertolas J, Gomez-Barrena E. Effect of surface roughness and sterilization on bacterial adherence to ultra-high molecular weight polyethylene. Clin Microbiol Infect 2010; 16:1036-41. [DOI: 10.1111/j.1469-0691.2009.02995.x] [Citation(s) in RCA: 26] [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: 11/29/2022]
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López-Santos C, Yubero F, Cotrino J, González-Elipe AR. Surface functionalization, oxygen depth profiles, and wetting behavior of PET treated with different nitrogen plasmas. ACS Appl Mater Interfaces 2010; 2:980-990. [PMID: 20423118 DOI: 10.1021/am100052w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Polyethylene terephthalate (PET) plates have been exposed to different nitrogen containing plasmas with the purpose of incorporating nitrogen functional groups on its surface. Results with a dielectric barrier discharge (DBD) at atmospheric pressure and a microwave discharge (MW) at reduced pressure and those using an atom source working under ultrahigh vacuum conditions have been compared for N(2) and mixtures Ar + NH(3) as plasma gases. The functional groups have been monitored by X-ray Photoemission Spectroscopy (XPS). Nondestructive oxygen and carbon depth profiles for the plasma treated and one month aged samples have been determined by means of the nondestructive Tougaard's method of XPS background analysis. The surface topography of the treated samples has been examined by Atomic Force Microscopy (AFM), while the surface tension has been determined by measuring the static contact angles of water and iodomethane. It has been found that the DBD with a mixture of Ar+NH(3) is the most efficient treatment for nitrogen and amine group functionalization as determined by derivatization by reaction with chlorobenzaldehyde. It is also realized that the nitrogen functional groups do not contribute significantly to the observed increase in surface tension of plasma treated PET.
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Affiliation(s)
- Carmen López-Santos
- Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla, Avenida Americo Vespucio 49, 41092 Sevilla, Spain
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Preda I, Soriano L, Alvarez L, Méndez J, Yubero F, Gutiérrez A, Sanz JM. Study of the morphology of NiO nanostructures grown on highly ordered pyrolytic graphite, by the Tougaard method and atomic force microscopy: a comparative study. SURF INTERFACE ANAL 2010. [DOI: 10.1002/sia.3222] [Citation(s) in RCA: 6] [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: 11/12/2022]
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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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Borrás A, Barranco A, Yubero F, González-Elipe AR. Supported Ag-TiO(2) core-shell nanofibres formed at low temperature by plasma deposition. Nanotechnology 2006; 17:3518-3522. [PMID: 19661598 DOI: 10.1088/0957-4484/17/14/026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ag-TiO(2) nanofibres (about three microm long and 30-150 nm thick) formed by a single-crystalline silver wire (20-30 nm thick) and an external layer of amorphous TiO(2) of variable thickness are prepared at 403 K by oxygen plasma activation of a silver substrate followed by plasma deposition of TiO(2). Thicker fibres of anatase crystallites surrounding the silver wire were prepared when plasma deposition was carried out at 523 K. The fibres have been analysed by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray photoemission spectroscopy (XPS). The plasmon losses of the silver core wire have been characterized by electron energy loss spectroscopy in the TEM microscope. Based on the experimental evidence, a new volcano-type mechanism of formation of these core-shell fibres is proposed, whereby the effect of the plasma and the high mobility of the silver would be key factors determining their morphology and dimensions.
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Affiliation(s)
- Ana Borrás
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Univ. Sevilla), Avenida Américo Vespucio s/n, 41092 Sevilla, Spain
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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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Kövér L, Novák M, Egri S, Cserny I, Berényi Z, Tóth J, Varga D, Drube W, Yubero F, Tougaard S, Werner WSM. Intrinsic and extrinsic excitations in deep core photoelectron spectra of solid Ge. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2134] [Citation(s) in RCA: 10] [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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Pauly N, Tougaard S, Yubero F. Theoretical determination of the surface excitation parameter from X-ray photoelectron spectroscopy. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2173] [Citation(s) in RCA: 8] [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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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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Reiche R, Oswald S, Yubero F, Espinós JP, Holgado JP, González-Elipe AR. Monitoring Interface Interactions by XPS at Nanometric Tin Oxides Supported on Al2O3 and Sb2Ox. J Phys Chem B 2004. [DOI: 10.1021/jp031274m] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Martin-Concepción AI, Yubero F, Espinos JP, Garcia-Lopez J, Tougaard S. Determination of amount of substance for nanometre-thin deposits: consistency between XPS, RBS and XRF quantification. SURF INTERFACE ANAL 2003. [DOI: 10.1002/sia.1635] [Citation(s) in RCA: 10] [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: 11/09/2022]
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Reiche R, Holgado JP, Yubero F, Espinos JP, Gonzalez-Elipe AR. Characterization of Sb2
O3
subjected to different ion and plasma surface treatments. SURF INTERFACE ANAL 2003. [DOI: 10.1002/sia.1523] [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: 11/08/2022]
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Yubero F, Holgado JP, Barranco A, González-Elipe AR. Determination of surface nanostructure from analysis of electron plasmon losses in XPS. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1283] [Citation(s) in RCA: 10] [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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Fuentes GG, Elizalde E, Yubero F, Sanz JM. Electron inelastic mean free path for Ti, TiC, TiN and TiO2 as determined by quantitative reflection electron energy-loss spectroscopy. SURF INTERFACE ANAL 2002. [DOI: 10.1002/sia.1205] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.4] [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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