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Listar por palabra clave "Raman"

Mostrando ítems 1-17 de 17

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 ...
Caracterización estructural y vibracional del compuesto In2Se3 y sus aplicaciones

Gallego Parra, Samuel (Universitat Politècnica de València, 2017-12-27)

In this project, a structural and vibrational characterization under high-pressure of the In2Se3 compound will be carried out using the techniques of X-ray diffraction and Raman spectroscopy, respectively. It will be ...
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 ...
Enhanced Stability of Cu Clusters of Low Atomicity against Oxidation. Effect on the Catalytic Redox Process

Concepción Heydorn, Patricia; Boronat Zaragoza, Mercedes; García García, Saray; Fernández-Villanueva, Estefanía; Corma Canós, Avelino (American Chemical Society, 2017)

[EN] By a combination of theoretical modeling and XPS and SERS spectroscopic studies, it has been found that it is possible to stabilize metallic copper species under oxidizing reaction conditions by adjusting the atomicity ...
Espectroscopia Raman del compuesto Bi2O2Se bajo altas presiones

Escrig Villalonga, Marc (Universitat Politècnica de València, 2020-10-16)

[ES] El presente TFM tiene por objetivo la medición y análisis del espectro Raman del compuesto Bi2O2Se, con interesantes propiedades termoeléctricas, en condiciones de alta presión. Por tanto, el trabajo del alumno ...
Experimental and Theoretical Studies on alfa-In2Se3 at High Pressure

Vilaplana Cerda, Rosario Isabel; Gallego-Parra, Samuel; Jorge-Montero, A.; Rodríguez-Hernández, Plácida; Muñoz, Alfonso; Errandonea, Daniel; Segura, Alfredo; Manjón, Francisco-Javier (American Chemical Society, 2018)

[EN] alpha(R)-In2Se3 has been experimentally and theoretically studied under compression at room temperature by means of X-ray diffraction and Raman scattering measurements as well as by ab initio total-energy and ...
Experimental and Theoretical Study of B2X3 Sesquichalcogenides under Extreme Conditions

Gallego Parra, Samuel (Universitat Politècnica de València, 2023-01-23)

[ES] Los sesquicalcogenuros con estequiometria B2X3, con A = Al, Ga e In y X = S, Se y Te, han recibido gran atención a lo largo de los últimos años, en particular en como modificarlos para obtener nuevas estructuras con ...
High-pressure structural and vibrational properties of monazite-type BiPO4, LaPO4, CePO4, and PrPO4

Errandonea, D.; Gomis, O.; Rodríguez Hernández, Plácida; Muñoz, A.; Ruiz Fuertes, J.; Gupta, M.; Achary, S.N.; Hirsch, A.; Manjón, Francisco-Javier; Peters, L.; Roth, G.; Tyagi, A.K.; Bettinelli, Marco (IOP Publishing, 2018)

[EN] Monazite-type BiPO4, LaPO4, CePO4, and PrPO4 have been studied under high pressure by ab initio simulations and Raman spectroscopy measurements in the pressure range of stability of the monazite structure. A good ...
High-pressure study of the behavior of mineral barite by X-ray diffraction

Santamaría-Pérez, D.; Gracia, L.; Garbarino, G.; Beltrán, A.; Chuliá-Jordán, R.; Gomis Hilario, Oscar; Errandonea, D.; Ferrer-Roca, Ch.; Martínez-García, D.; Segura, A. (American Physical Society, 2011-08-02)

In this paper, we report the angle-dispersive x-ray diffraction data of barite, BaSO 4, measured in a diamond-anvil cell up to a pressure of 48 GPa, using three different fluid pressure-transmitting media (methanol-ethanol ...
High-Pressure Synthesis of betha and alpha-In2Se3-Like Structures in Ga2S3

Gallego-Parra, Samuel; Vilaplana Cerda, Rosario Isabel; Gomis, O.; Rodríguez-Hernández, Plácida; Muñoz, Alfonso; González, Jesus Antonio; Sans-Tresserras, Juan Ángel; Popescu, Catalin; Manjón, Francisco-Javier (American Chemical Society, 2022-07-12)

[EN] The synthesis of polymorphs of alpha '-Ga2S3 at room temperature on compression/decompression is studied from a joint experimental and theoretical point of view to reveal the nature of their crystalline structures. ...
Identificación y evolución en el tiempo de microplásticos en aguas y lodos de depuradoras de la Comunidad Valenciana

Sánchez Alberola, Santiago (Universitat Politècnica de València, 2023-10-05)

[ES] La elevada presencia de microplásticos (MPs) en el medio ambiente es una preocupación mundial debido al potencial impacto sobre organismos acuáticos y terrestres. Además, la presencia de estos materiales persistentes ...
Isostructural second-order phase transition of b-Bi2O3 at high pressures: an experimental and theoretical study

Pereira, Andre L. J.; Sans Tresserras, Juan Ángel; Vilaplana Cerda, Rosario Isabel; Gomis, O.; Manjón Herrera, Francisco Javier; Rodriguez-Hernandez, Placida; Muñoz, Alfonso; Popescu, Catalin; Beltran, Armando (American Chemical Society, 2014-10-09)

We report a joint experimental and theoretical study of the structural and vibrational properties of synthetic sphaerobismoite (beta-Bi2O3) at high pressures in which room-temperature angle-dispersive X-ray diffraction ...
Memoria e conoscenza. Il castello di Belmonte in Calabria

Gattuso, Caterina; Castriota, Marco; Gattuso, Philomène; Saggio, Francesca (Editorial Universitat Politècnica de València, 2020-05-15)

[EN] A small A small village located in Italy on the Calabrian Tyrrhenian coast, Belmonte Calabro has its historic center with a typical medieval urban structure that has remained almost unchanged over the centuries and ...
OXIDACIÓN SELECTIVA DE PROPANO Y ETANO EMPLEANDO CATALIZADORES BASADOS EN OXIDOS MULTICOMPONENTES

Massó Ramírez, Amada (Universitat Politècnica de València, 2017-11-06)

SUMMARY The current doctoral thesis studies the synthesis of Mo-V-Te-containing mixed metal oxides and the characterization of their physico-chemical and catalytic properties for alkanes selective oxidation reactions, such ...
Oxidative dehydrogenation of ethane over Ni-W-O mixed metal oxides catalysts

Solsona Espriu, Benjamin Eduardo; López Nieto, José Manuel; Concepción Heydorn, Patricia; Dejoz, A.; Ivars Barceló, Francisco; Vazquez, M. I. (Elsevier, 2011-05-16)

Ni-W-O mixed oxides were prepared through the evaporation of aqueous solutions of nickel nitrate and ammonium tungstate and calcined in air at 500 degrees C for 2 h. The catalysts were characterized by several techniques ...
Phase behaviour of Ag2CrO4 under compression: Structural, vibrational, and optical properties

Santamaría Pérez, David; Bandiello, Enrico; Errandonea, Daniel; Ruiz-Fuertes, Javier; Gomis Hilario, Oscar; Sans, Juan Ángel; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, Plácida; Muñoz, Alfonso (American Chemical Society, 2013-06-13)

We have performed an experimental study of the crystal structure, lattice dynamics, and optical properties of silver chromate (Ag2CrO4) at ambient temperature and high pressures. In particular, the crystal structure, ...
Structural and vibrational properties of CdAl2S4 under high pressure: Experimental and theoretical approach

Sans Tresserras, Juan Ángel; Santamaría Pérez, David; Popescu, Catalin; Gomis, O.; Manjón Herrera, Francisco Javier; Vilaplana Cerda, Rosario Isabel; Muñoz, Alfonso; Rodríguez Hernández, Plácida; Ursaki, Veacheslav; Tiginyanu, Ivan (American Chemical Society, 2014-07-17)

The behavior of defect chalcopyrite CdAl2S4 at high pressures and ambient temperature has been investigated in a joint experimental and theoretical study. High-pressure X-ray diffraction and Raman scattering measurements ...