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Listar por autor "Manjón Herrera, Francisco Javier"

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A theoretical study of the Pnma and R3m phases of Sb2S3, Bi2S3, and Sb2Se3

Da Silva, Estelina Lora; Skelton, J. M.; Rodríguez-Hernández, P.; Muñoz, A.; Santos, M. C.; Martínez-García, D.; Vilaplana Cerda, Rosario Isabel; Manjón, Francisco-Javier (The Royal Society of Chemistry, 2022-10-20)

[EN] We report a comparative theoretical study of the Pnma and R3m phases of Sb2S3, Bi2S3, and Sb2Se3 close to ambient pressure. Our enthalpy calculations at 0 K show that at ambient pressure the R3m (tetradymite-like) ...
Analysis of the upconversion emission of yttrium orthoaluminate nanoperovskite co-doped with Er3+/Yb3+ ions for thermal sensing applications

Hernández-Rodríguez, M.A.; Lozano-Gorrín, A.D.; Lavin, V.; Rodriguez-Mendoza, U.R.; Martin, I.R.; Manjón, Francisco-Javier (Elsevier, 2018-10)

[EN] The upconversion emissions of yttrium orthoaluminate nano-perovskite co-doped with Er3+/Yb3+ have been studied. Strong green and red upconversion emissions, which can be observed by naked eyes, were observed when ...
Análisis del proceso de búsqueda de información en internet en conjuntos de usuarios diferenciados

Leiva Aguilar, Alba (Universitat Politècnica de València, 2017-02-13)

[EN] In the last decade internet information foraging has become a daily event for people around the world, and it is an activity that traverses so many areas of our lives, be it personal or professionally. It is important ...
Anomalous Raman modes in tellurides

Manjón, Francisco-Javier; Gallego-Parra, Samuel; Rodríguez Hernández, Plácida; Muñoz, Alfonso; Drasar, Cestmir; Muñoz-Sanjosé, Vicente; Oeckler, Oliver (The Royal Society of Chemistry, 2021-05-21)

[EN] Two anomalous broad bands are usually found in the Raman spectrum of bulk and 2D Te-based chalcogenides, which include binary compounds, like ZnTe, CdTe, HgTe, GaTe, GeTe, SnTe, PbTe, GeTe2, As2Te3, Sb2Te3, Bi2Te3, ...
beta-Bi2O3 under compression: Optical and elastic properties and electron density topology analysis

Pereira, A. L. J.; Gomis, O.; Sans Tresserras, Juan Ángel; Contreras-García, J.; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, P.; Muñoz, A.; Beltrán, A. (American Physical Society, 2016-06-30)

We report a joint experimental and theoretical study of the optical properties of tetragonal bismuth oxide (beta-Bi2O3) at high pressure by means of optical absorption measurements combined with ab initio electronic band ...
Borates or phosphates? That is the question

Contreras-García, J.; Izquierdo-Ruiz, F.; Marqués, M.; Manjón, Francisco-Javier (International Union of Crystallography, 2020-03)

[EN] Chemical nomenclature is perceived to be a closed topic. However, this work shows that the identification of polyanionic groups is still ambiguous and so is the nomenclature for some ternary compounds. Two examples, ...
Broadband, site selective and time resolved photoluminescence spectroscopic studies of finely size-modulated Y2O3:Eu3+ phosphors synthesized by a complex based precursor solution method

Ray, Sudeshna; León-Luis, Sergio Fabián; Manjón Herrera, Francisco Javier; Mollar García, Miguel Alfonso; Gomis Hilario, Oscar; Rodríguez-Mendoza, Ulises Ruyman; Agouram, Said; Muñoz, Alfonso; Lavín, Victor (Elsevier, 2014-01)

Undoped and Eu3+-doped cubic yttria (Y2O3) nanophosphors of good crystallinity, with selective particle sizes ranging between 6 and 37 nm and showing narrow size distributions, have been synthesized by a complex-based ...
Characterization and Decomposition of the Natural van der Waals SnSb2Te4 under Compression

Sans-Tresserras, Juan Ángel; Vilaplana Cerda, Rosario Isabel; Da Silva, E. Lora; Popescu, Catalin; Cuenca-Gotor, Vanesa Paula; Andrada-Chacón, Adrián; Sánchez-Benitez, Javier; Gomis, O.; Pereira, André L. J.; Rodríguez-Hernández, Plácida; Muñoz, Alfonso; Daisenberger, Dominik; García-Domene, Braulio; Segura, Alfredo; Errandonea, Daniel; Manjón, Francisco-Javier (American Chemical Society, 2020-07-20)

[EN] High pressure X-ray diffraction, Raman scattering, and electrical measurements, together with theoretical calculations, which include the analysis of the topological electron density and electronic localization function, ...
Chemical pressure effects on the spectroscopic properties of Nd3+-doped gallium nano-garnets

Monteseguro, V.; Rathaiah, M.; Linganna, K.; Lozano-Gorrin, A. D.; Hernandez-Rodriguez, M. A.; Martin, I. R.; Babu, P.; Rodriguez-Mendoza, U. R.; Manjón, Francisco-Javier; Muñoz, A.; Jayasankar, C. K.; Venkatramu, V.; Lavin, V. (The Optical Society, 2015-08-01)

[EN] Nd3+-doped RE3Ga5O12 (RE = Gd, Y, and Lu) nano-crystalline garnets of 40-45 nm in size have been synthesized by a sol-gel method. With the decrease of the RE atom size, the chemical pressure related to the decreasing ...
Combined Experimental and Theoretical Studies: Lattice-Dynamical Studies at High Pressures with the Help of Ab Initio Calculations

Manjón, Francisco-Javier; Sans-Tresserras, Juan Ángel; Rodríguez-Hernández, Placida; Muñoz, Alfonso (MDPI AG, 2021-11)

[EN] Lattice dynamics studies are important for the proper characterization of materials, since these studies provide information on the structure and chemistry of materials via their vibrational properties. These studies ...
Compressibility systematics of calcite-type borates : An experimental and theoretical structural study on ABO3 (A = Al, Sc, Fe and In)

Santamaría Pérez, David; Gomis Hilario, Oscar; Sans, Juan Ángel; Ortiz, H. M.; Vegas, Ángel; Errandonea, Daniel; Ruiz-Fuertes, Javier; Martínez-García, Domingo; García-Domene, B.; Pereira, ALJ; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, Placida; Muñoz, A.; Piccinelli, F.; Bettinelli, M.; Popescu, C. (American Chemical Society, 2014-02-27)

The structural properties of calcite-type orthoborates ABO(3) (A = Al, Fe, Sc, and In) have been investigated at high pressures up to 32 GPa. They were studied experimentally using synchrotron powder X-ray diffraction and ...
Crystal Chemistry of CdIn2S4, MgIn2S4, and MnIn2S4 thiospinels under high pressure

Santamaría Pérez, David; Amboage, Mónica; Manjón Herrera, Francisco Javier; Errandonea, Daniel; Muñoz, Alfonso; Rodríguez Hernández, Plácida; Mújica, Andrés; Radescu, Silvana; Ursaki, Veacheslav; Tinginyanu, Ivan (American Chemical Society, 2012-07-05)

We report X-ray diffraction measurements in CdIn2S4, MgIn2S4, and MnIn2S4 thiospinels at room temperature and high pressures. The pressure dependences of the structural parameters have been determined and compared to those ...
Crystal structure of sinhalite MgAlBO4 under high pressure

Santamaría Pérez, David; Errandonea, Daniel; Gomis, O.; Sans Tresserras, Juan Ángel; Pereira, A. L. J.; Manjón Herrera, Francisco Javier; Popescu, Catalin; Rodríguez Hernández, Plácida; Muñoz, Alfonso (American Chemical Society, 2015-03-26)

We report on high-pressure angle-dispersive X-ray diffraction data up to 27 GPa for natural MgAlBO4 sinhalite mineral and ab initio total energy calculations. The experimental bulk modulus of sinhalite is B-0 = 171(3) GPa ...
Diseño de diversos mecanismos de presión para una celda de yunques de diamante

Fernández Lluna, Juan (2021-11-15)

[ES] El presente proyecto es de ejecución material, al tratarse de un producto industrial. Este proyecto tiene por objeto el diseño de dos mecanismos de presurización para una celda de yunques de diamante. Los dos mecanismos ...
Diseño e implementación de un sistema de adquisición de datos biométrico para la evaluación de pilotos de competición

Bori Fabra, Óscar (Universitat Politècnica de València, 2021-01-11)

[ES] El presente trabajo plantea el diseño y la implementación de un sistema de adquisición de datos biométrico para la evaluación de pilotos de competición. Este sistema permitirá la monitorización en tiempo real de las ...
Diseño y cálculo de una instalación para calefacción mediante suelo radiante y ACS en una vivienda unifamiliar

Martín Valladolid, Iván (Universitat Politècnica de València, 2014-09-11)

La principal motivación para realizar este proyecto, es la implantación de una tecnología que permita responder a las nuevas normativas, así como, las necesidades actuales de la sociedad. Para ello nos centraremos en el ...
Diseño y contrucción de un autómata encargado del análisis de planitud y espesor de las bielas en la planta de American Axle & Manufacturing en Valencia

García Dasi, Alejandro (Universitat Politècnica de València, 2018-10-29)

[ES] El objetivo del proyecto es la implementación en planta de un automata que realice la medición y análisis de la planitud y espesor de las bielas. Este proceso actualmente se esta realizando manualmente. Automatizando ...
Effect of pressure on La-2(WO4)(3) with a modulated scheelite-type structure

Sabalisck, N.P.; Lopez Solano, Javier; Guzmán-Afonso, C.; Santamaría Pérez, David; González-Silgo, C.; Mújica, Andrés; Muñoz, Alfonso; Rodríguez Hernández, Plácida; Radescu, Silvana; Vendrell, X.; Mestres, L.; Sans Tresserras, Juan Ángel; Manjón Herrera, Francisco Javier (American Physical Society, 2014-05-27)

We have studied the effect of pressure on the structural and vibrational properties of lanthanum tritungstate La2(WO4)3. This compound crystallizes under ambient conditions in the modulated scheelite-type structure known ...
Effects of high-pressure on the structural, vibrational, and electronic properties of monazite-type PbCrO4

Bandiello, E.; Errandonea, D.; Martinez-Garcia, D.; Santamaria-Perez, D.; Manjón Herrera, Francisco Javier (American Physical Society, 2012-01-12)

We have performed an experimental study of the crystal structure, lattice dynamics, and optical properties of PbCrO 4 (the mineral crocoite) at ambient and high pressures. In particular, the crystal structure, Raman-active ...
Effects of symmetry breaking in low dimensional materials

César Dos Santos, Mário Jorge (Universitat Politècnica de València, 2021-11-04)

[EN] The dimensionality of the system plays a decisive role in the behavior of the electronic dynamics of interacting electrons. In particular, the quasi-2D dimensionality is responsible for the unusual behavior observed ...