Search

Your search keyword '"Criado G"' showing total 390 results
Start Over Author "Criado G"
390 results on '"Criado G"'

52. X-exome sequencing of 405 unresolved families identifies seven novel intellectual disability genes

Author

Hu, H, primary, Haas, S A, additional, Chelly, J, additional, Van Esch, H, additional, Raynaud, M, additional, de Brouwer, A P M, additional, Weinert, S, additional, Froyen, G, additional, Frints, S G M, additional, Laumonnier, F, additional, Zemojtel, T, additional, Love, M I, additional, Richard, H, additional, Emde, A-K, additional, Bienek, M, additional, Jensen, C, additional, Hambrock, M, additional, Fischer, U, additional, Langnick, C, additional, Feldkamp, M, additional, Wissink-Lindhout, W, additional, Lebrun, N, additional, Castelnau, L, additional, Rucci, J, additional, Montjean, R, additional, Dorseuil, O, additional, Billuart, P, additional, Stuhlmann, T, additional, Shaw, M, additional, Corbett, M A, additional, Gardner, A, additional, Willis-Owen, S, additional, Tan, C, additional, Friend, K L, additional, Belet, S, additional, van Roozendaal, K E P, additional, Jimenez-Pocquet, M, additional, Moizard, M-P, additional, Ronce, N, additional, Sun, R, additional, O'Keeffe, S, additional, Chenna, R, additional, van Bömmel, A, additional, Göke, J, additional, Hackett, A, additional, Field, M, additional, Christie, L, additional, Boyle, J, additional, Haan, E, additional, Nelson, J, additional, Turner, G, additional, Baynam, G, additional, Gillessen-Kaesbach, G, additional, Müller, U, additional, Steinberger, D, additional, Budny, B, additional, Badura-Stronka, M, additional, Latos-Bieleńska, A, additional, Ousager, L B, additional, Wieacker, P, additional, Rodríguez Criado, G, additional, Bondeson, M-L, additional, Annerén, G, additional, Dufke, A, additional, Cohen, M, additional, Van Maldergem, L, additional, Vincent-Delorme, C, additional, Echenne, B, additional, Simon-Bouy, B, additional, Kleefstra, T, additional, Willemsen, M, additional, Fryns, J-P, additional, Devriendt, K, additional, Ullmann, R, additional, Vingron, M, additional, Wrogemann, K, additional, Wienker, T F, additional, Tzschach, A, additional, van Bokhoven, H, additional, Gecz, J, additional, Jentsch, T J, additional, Chen, W, additional, Ropers, H-H, additional, and Kalscheuer, V M, additional

Published
2015
Full Text
View/download PDF

54. Impact of stress on recombination of metal precipitates in silicon

Author

Gundel, P., Schubert, M.C., Heinz, F.D., Kwapil, W., Warta, W., Martinez-Criado, G., Reiche, M., Weber, E.R., and Publica

Subjects
Silicium-Photovoltaik, Messtechnik und Produktionskontrolle, Feedstock, Charakterisierung, Zellen und Module, Charakterisierung von Prozess- und Silicium-Materialien, Siliciummaterialcharakterisierung, Kristallisation und Wafering, Solarzellen - Entwicklung und Charakterisierung
Abstract

Metals corrupt the performance of silicon solar cells severely. In this paper we investigate the recombination activity of metal precipitates and present a strong positive correlation between their recombination activity and the stress around them, independent of the type of metal forming the precipitate. This fundamental observation suggests that stress, together with the size of the precipitate, has a dominant effect on the recombination activity of metallic precipitates. We explain the recombination enhancing effect of stress near precipitates by the strong piezoresistance of silicon.

Published
2010

55. Enhanced sputtering and incorporation of Mn in implanted GaAs and ZnO nanowires

Author

Johannes, Andreas, Noack, Stefan, Paschoal Jr, Waldomiro, Kumar, Sandeep, Jacobsson, Daniel, Pettersson, Håkan, Samuelson, Lars, Dick, Kimberly A., Martinez-Criado, G., Burghammer, M., Ronning, Carsten, Johannes, Andreas, Noack, Stefan, Paschoal Jr, Waldomiro, Kumar, Sandeep, Jacobsson, Daniel, Pettersson, Håkan, Samuelson, Lars, Dick, Kimberly A., Martinez-Criado, G., Burghammer, M., and Ronning, Carsten

Abstract

We simulated and experimentally investigated the sputter yield of ZnO and GaAs nanowires, which were implanted with energetic Mn ions at room temperature. The resulting thinning of the nanowires and the dopant concentration with increasing Mn ion fluency were measured by accurate scanning electron microscopy (SEM) and nano-x-Ray Fluorescence (nanoXRF) quantification, respectively. We observed a clearly enhanced sputter yield for the irradiated nanowires compared to bulk, which is also corroborated by iradina simulations. These show a maximum if the ion range matches the nanowire diameter. As a consequence of the erosion thinning of the nanowire, the incorporation of the Mn dopants is also enhanced and increases non-linearly with increasing ion fluency. © 2014 IOP Publishing Ltd., The authors gratefully acknowledge funding by the German Research Society (DFG) within the DACH project. We thank the European Synchrotron Radiation Facility (ESRF) for the allocated beam-time.The authors acknowledge financial support from the Nanometer Structure Consortium at Lund University (nmC@LU), the Swedish Research Council (VR), and the Knut and Alice Wallenberg Foundation (KAW). A correction for the article is linked.

Published
2014
Full Text
View/download PDF

56. Micro-Luminescence Spectroscopy on Multicrystalline Silicon

Author

Gundel, P., Schubert, M.C., Kwapil, W., Schön, J., Reiche, M., Savin, H., Yli-Koski, M., Sans, J.A., Martinez-Criado, G., Warta, W., and Weber, E.R.

Subjects
Mono- and Multicrystalline Silicon Materials and Cells, Wafer-based Silicon Solar Cells and Materials Technology
Abstract

24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 907-912, The luminescence of silicon has been used for many applications such as lifetime measurements and defect characterization in multicrystalline silicon for solar cells. In this paper we demonstrate new applications of luminescence spectroscopy for the characterization of multicrystalline silicon which are based on a very high spatial resolution in the order of one μm. These applications are the detection of small metal precipitates, the qualitative measurement of internal stress and X-ray Excited Optical Luminescence for correlating of X-ray fluorescence measurements with the minority carrier diffusion length.

Published
2009
Full Text
View/download PDF

57. X-ray excited optical luminescence from crystalline silicon

Author

Gundel, P., Martinez-Criado, G., Schubert, M.C., Sans, J.A., Kwapil, W., Warta, W., Weber, E.R., and Publica

Subjects
Siliciummaterialcharakterisierung
Abstract

Synchrotron based X-ray excited optical luminescence (XEOL) has been measured with many direct bandgap semiconductors. We present XEOL measurements on crystalline silicon (Si), obtained despite of its indirect bandgap and the consequently low luminescence efficiency. Spectra of monocrystalline and multicrystalline (mc) Si at room temperature are compared to theoretical spectra. A possible application in the synchrotron-based research on mc-Si is exemplified by combining XEOL, X-ray fluorescence (XRF) spectroscopy, photoluminescence (PL) spectroscopy, and microscope images of grain boundaries. This approach can be utilized to investigate the recombination activity of metal precipitates, to analyze areas of different lifetimes on mc-Si samples and to correlate additional material parameters to XRF measurements.

Published
2009

60. ID22 : a multitechnique hard X-ray microprobe beamline at the European Synchrotron Radiation Facility

Author

Somogyi, A., Tucoulou, R., Martinez-Criado, G., Homs, A., Bleuet, P., Simionovici, A., Laboratoire de Sciences de la Terre (LST), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), and Secrétariat, Sylvie

Subjects
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2005

61. Uranium speciation in two Freital mine tailing samples: EXAFS, micro-XRD, and micro-XRF results

Author

Scheinost, A., Hennig, C., Somogyi, A., Martinez-Criado, G., and Knappik, R.

Abstract

We investigated the uranium speciation in a former WISMUT mine tailing, which was buried for 30 years under mine and construction debris. Chemical extractions, EXAFS, -XRD, and -XRF reveal two major U pools. The first with a relatively high potential mobility was identified as U(VI) sorbed to layer silicates by inner-sphere complexation; the second pool is represented by the relatively insoluble U(IV) minerals pitchblende and coffinite, and by the U(VI) solids uranyl hydroxide and vanuralite. Distribution between the two pools seems to be con-trolled by pH. Evidence for reductive precipitation of uraninite was found.

Published
2005

62. Uranium speciation in 30-year old Freital mine tailings: An EXAFS, μ-XRD, and μ-XRF Study

Author

Scheinost, A., Hennig, C., Somogyi, A., Martinez-Criado, G., and Knappik, R.

Abstract

Risk assessments of actinide-contaminated soils and sediments require detailed knowledge of actinide speciation and its long-term kinetics. Former Saxonian mine tailings, which have been covered but else left undisturbed, are ideally suited to study changes in uranium speciation over timescales of decades. We investigated the major uranium species in two samples from buried mine tailings using a combination of Synchrotron-based microfocus-techniques (μ-XRF, μ-XRD with micrometer resolution), bulk EXAFS spectroscopy, and chemical extractions. In sample F1 (5 m depth, oxic, pH 8, U=440 mg/kg, high Ca, S, Pb, Cu, Zn concentrations), uranium is diffusely distributed among aggregates of layer silicates (muscovite, illite and kaolinite). The chemical extractions and EXAFS results confirm that uranium is sorbed to these minerals, but is not incorporated into their crystal structure. Sorption is also in line with the high pH and low carbonate concentrations in pore water. In sample F3 (12 m depth, oxic, pH 4, U=430 mg/kg), the combination of μ-XRF and μ-XRD enabled us to identify several U(IV) and U(VI) containing minerals like coffinite, uraninite, uranyl hydroxide, and vanuralite. Only a minor part of U is sorbed to layer silicates as confirmed by chemical extractions and EXAFS spectroscopy. At smaller depth (F1, 5 m), sulfuric acid from the ore extraction procedure was completely neutralized by the construction waste used as cover material, resulting in precipitation of jarosite and gypsum. Even 30 years after the ore extraction, uranium remains highly soluble. At greater depth (F3, 12 m), the low pH from ore extraction was conserved. The presence of U(IV) minerals suggest either precipitation of secondary (IV) minerals due to microbial redox activity, or incomplete dissolution of primary (IV) minerals due to ore processing inefficiency of these older sediments. The U(IV) minerals were recalcitrant during chemical extractions, suggesting low uranium solubility even at oxic redox conditions. The results demonstrate a very high variability of uranium speciation and hence potential mobility, which seems to depend on geochemical parameters and site history, but shows little influence of time.

Published
2005

63. Application of synchrotron radiation excited X-ray microprobe techniques in material and environmental science

Author

Somogyi, A., Martinez-Criado, G., Scheinost, A., and Tucoulou, R.

Abstract

Synchrotron radiation excited X-ray microprobe techniques (-XRF/XAS, -XRD, imaging/tomography) give unique possibility for non-destructive, in situ investigation of several sample characteristics (elemental- and crystalline composition, chemical speciation, morphology) and different chemical, environmental processes within inhomogeneous samples. The ID22 X-ray microprobe beamline of the European Synchrotron Radiation Facility (ESRF, Grenoble, France) offers the simultaneous use of these techniques with m spatial resolution in the 6-30 keV energy range. Material and environmental sciences are two scientific fields often requiring the combined investigation of the elemental distribution, chemical speciation, and crystalline structure of large number of samples with (sub)-micron spatial resolution. The new developments of the ID22 beamline can readily fulfill these requirements, as will be illustrated by the presented examples. The high 1010-5x1011 ph/s intensity of the micro-beam (depending on the spot-size, energy and focusing device) allows for continuous scanning -XRF measurements of sample areas of up to 1 mm2 with 0.6-2 m spatial resolution within

Published
2004

65. Euclid mission status

Author

Laureijs, R., additional, Racca, G., additional, Stagnaro, L., additional, Salvignol, J.-C., additional, Lorenzo Alvarez, J., additional, Saavedra Criado, G., additional, Gaspar Venancio, L., additional, Short, A., additional, Strada, P., additional, Colombo, C., additional, Buenadicha, G., additional, Hoar, J., additional, Kohley, R., additional, Vavrek, R., additional, Mellier, Y., additional, Berthe, M., additional, Amiaux, J., additional, Cropper, M., additional, Niemi, S., additional, Pottinger, S., additional, Ealet, A., additional, Jahnke, K., additional, Maciaszek, T., additional, Pasian, F., additional, Sauvage, M., additional, Wachter, S., additional, Israelsson, U., additional, Holmes, W., additional, Seiffert, M., additional, Cazaubiel, V., additional, Anselmi, A., additional, and Musi, P., additional

Published
2014
Full Text
View/download PDF

72. Caracterización morfológica de la raza 'galiña de Mos': patrón de la raza

Author

Rois, D., Feijóo, J.B., Rivero, C.J., Adán, S., Fernández, M., Rivero, G., Fernández, P., Díaz, R., and Criado, G.

Subjects
Razas autóctonas, Gallinas, Galicia (España), Caracterización racial
Abstract

Resumen de la comunicación presentada al III Congreso Ibérico sobre Recursos Genéticos Animales

Published
2002

73. Iron oxidation state in garnet from a subduction setting: a micro-XANES and electron microprobe (“flank method”) comparative study

Author

Mino, L, Borfecchia, E, Groppo, C, Gianolio, D, Malaspina, N, Martinez Criado, G, Sans Tresserras, J, Poli, S, Castelli, D, Lamberti, C, Sans Tresserras, JA, Lamberti, C., MALASPINA, NADIA, Mino, L, Borfecchia, E, Groppo, C, Gianolio, D, Malaspina, N, Martinez Criado, G, Sans Tresserras, J, Poli, S, Castelli, D, Lamberti, C, Sans Tresserras, JA, Lamberti, C., and MALASPINA, NADIA

Published
2012

74. Thermal instability of implanted Mn ions in ZnO

Author

Sans, J A, Martinez-Criado, G, Susini, J, Sanz, R, Jensen, Jens, Minguez, I, Hernandez-Velez, M, Labrador, A, Carpentier, P, Sans, J A, Martinez-Criado, G, Susini, J, Sanz, R, Jensen, Jens, Minguez, I, Hernandez-Velez, M, Labrador, A, and Carpentier, P

Abstract

This letter reports on the site configuration of implanted Mn cations in ZnO. The samples studied were obtained by means of ion implantation in m-plane ZnO single crystals. Synchrotron radiation based fluorescence shows no contamination during the implantation process. The results of micro-x-ray absorption spectroscopy indicate that Mn ions are located in substitutional sites without detectable traces of secondary phases. The postgrowth thermal annealing in O-2 atmosphere induces a change in the coordination of a large amount of Mn cations, corresponding to alpha-Mn2O3.

Published
2010
Full Text
View/download PDF

80. Uranium speciation in two Freital mne tailing samples: EXAFS, micro- XRD and micro-XRF results.

Author

Scheinost A.C., Fourth Uranium mining and hydrogeology conference, UMH IV, Hennig C., Knappik R., Martinez-Criado G., Somogyi A., Scheinost A.C., Fourth Uranium mining and hydrogeology conference, UMH IV, Hennig C., Knappik R., Martinez-Criado G., and Somogyi A.

Abstract

The German tailings investigated had been buried for 30 years under mine and construction debris. Selective sequential chemical extractions, bulk L(III)-edge X-ray absorption fine structure (EXAFS) spectroscopy and synchotron micro-X-ray fluorescence (XRF) and micro-X-ray diffraction (XRD) revealed two major U pools. The first, with a relatively high potential mobility, was identified as U(VI) sorbed to layer sillicates by inner-sphere complexing; the second was represented by the relatively insoluble U(IV) minerals pitchblende and coffinite, and by the U(VI) solids uranyl hydroxide and vanuralite. Distribution between the two pools seemed to be controlled by pH and evidence was found for reductive precipitation of uraninite., The German tailings investigated had been buried for 30 years under mine and construction debris. Selective sequential chemical extractions, bulk L(III)-edge X-ray absorption fine structure (EXAFS) spectroscopy and synchotron micro-X-ray fluorescence (XRF) and micro-X-ray diffraction (XRD) revealed two major U pools. The first, with a relatively high potential mobility, was identified as U(VI) sorbed to layer sillicates by inner-sphere complexing; the second was represented by the relatively insoluble U(IV) minerals pitchblende and coffinite, and by the U(VI) solids uranyl hydroxide and vanuralite. Distribution between the two pools seemed to be controlled by pH and evidence was found for reductive precipitation of uraninite.

Published
2006

81. Physical properties and applications of InxGa1-xN nanowires.

Author

Segura-Ruiz, J., Gómez-Gómez, M., Garro, N., Martínez-Criado, G., Cantarero, A., Denker, C., Malindretos, J., and Rizzi, A.

Subjects
NANOWIRES, OPTICAL properties of nanostructured materials, MOLECULAR beam epitaxy, INDIUM gallium nitride, RAMAN scattering, LUMINESCENCE spectroscopy, X-ray fluorescence, EMISSION spectroscopy
Abstract

We have successfully grown InxGa1-xN nanowires by plasma-assisted molecular beam epitaxy on silicon substrates. The alloy composition and crystal quality have been analyzed by Raman scattering, photoluminescence spectroscopy and x-ray fluorescence nanoprobe techniques. InxGa1-xN is an one-mode alloy, where the different optical modes have an intermediate frequency of that of pure InN and GaN. The sample composition can be derived from the Raman data. On the other hand, by using the optical gap provided by the emission spectra, we conclude that the samples have a lower Ga content than that provided by the Raman analysis. X-ray fluorescence maps and photoluminescence measured in single nanowires help to explain this contradictory result. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

82. Uranium speciation in two Freital mine tailing samples: EXAFS, µ-XRD, and µ-XRF results

Author

Scheinost, A. C., Hennig, C., Somogyi, A., Martinez-Criado, G., Knappik, R., Scheinost, A. C., Hennig, C., Somogyi, A., Martinez-Criado, G., and Knappik, R.

Abstract

Forty years of uranium mining in the German state of Saxony have left a legacy of uranium-contaminated pits, waste piles, mine tailings and surrounding soils. Since 1963, and more extensively since 1989, contaminated sites were covered in order to protect people and environment. Little is known on the further fate of uranium at these buried sites. Therefore, we investigated two mine tailing samples from hydrochloric-acid ore-extraction, which were buried for 30 years under several meters of mine and communal waste. The two samples were collected at depths of 5 m (sample 1) and 12 m (sample 2) below the surface. Due to the neutralizing influence of the waste cover, the upper sample 1 had a pH of 8, while the lower sample 2 had a pH of 4. Both samples were retrieved from oxic redox conditions. Chemical extractions showed that U is predominantly water soluble and/or ion exchangeable in sample 1, while U is predominantly bound in weakly soluble solid phases in sample 2. To further identify the uranium species, we applied a combination of Synchrotron-based methods, namely Extended X-ray Absorption Fine-Structure (EXAFS) spectroscopy of bulk samples, micro X-Ray Diffraction (µ-XRD) and micro X-Ray Fluorescence (µ-XRF) spectroscopy. In sample 1, uranium predominates homogeneously distributed at concentrations in the mg/kg range in aggregates with a diameter of tens to hundreds of µm. The aggregates consist of layer silicates (muscovite, kaolinite, illite), jarosite and gypsum. Chemical extractability, EXAFS, µ-XRD, and µ-XRF strongly suggest that U(VI) is adsorbed on edge sites of the layer silicates. In sample 2, U is heterogeneously distributed among single crystals and small aggregates with very high U concentrations (g/kg) and variable elemental composition. Besides the matrix minerals muscovite, kaolinite, illite and quartz, we identified pitchblende and coffinite, and found evidence for other uranyl hydroxide and vanadate solids. In addition, a smaller amount of uran

Published
2005

83. Euclid: ESA's mission to map the geometry of the dark universe

Author

Laureijs, R., primary, Gondoin, P., additional, Duvet, L., additional, Saavedra Criado, G., additional, Hoar, J., additional, Amiaux, J., additional, Auguères, J.-L., additional, Cole, R., additional, Cropper, M., additional, Ealet, A., additional, Ferruit, P., additional, Escudero Sanz, I., additional, Jahnke, K., additional, Kohley, R., additional, Maciaszek, T., additional, Mellier, Y., additional, Oosterbroek, T., additional, Pasian, F., additional, Sauvage, M., additional, Scaramella, R., additional, Sirianni, M., additional, and Valenziano, L., additional

Published
2012
Full Text
View/download PDF

96. Optical Investigation of ZnO Nanowires

Author

Martínez-Criado, G., primary, Hernández-Vélez, M., additional, Letard, I., additional, Cros, A., additional, Cantarero, A., additional, Mínguez-Bacho, I., additional, Susini, J., additional, Tucoulou, R., additional, Sans, J.A., additional, Sanz, R., additional, and Vázquez, M., additional

Published
2010
Full Text
View/download PDF

100. Fluorescence X-ray micro-spectroscopy activities at ESRF

Author

Salomé, M, primary, Bleuet, P, additional, Bohic, S, additional, Cauzid, J, additional, Chalmin, E, additional, Cloetens, P, additional, Cotte, M, additional, Andrade, V De, additional, Martinez-Criado, G, additional, Petitgirard, S, additional, Rak, M, additional, Tresserras, J A Sans, additional, Szlachetko, J, additional, Tucoulou, R, additional, and Susini, J, additional

Published
2009
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results