Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Vivianne Marquina"'
Autor:
M. Romero, Donald H. Galvan, Raul Escamilla, Raúl W. Gómez, Vivianne Marquina, A. Durán, E. Carvajal, Miguel Cruz-Irisson
Publikováno v:
Journal of Molecular Structure. 1125:350-357
The structural, elastic, vibrational, thermodynamic and electronic properties of the Mo2B intermetallic under pressure are assessed using first-principles calculations based on the generalized gradient approximation (GGA) proposed by Perdew-Wang (PW9
Autor:
Jesús Alberto León Flores, José Luis Pérez Mazariego, Vivianne Marquina Fábrega, Shirley Saraí Flores Morales, Raúl W. Gómez González
Publikováno v:
Physica B: Condensed Matter. 504:109-111
A sample of Bi 25 FeO 39 was synthesized by the molten salts method in 2 h at 750 °C with KCl-KBr as reaction media. The sample was characterized with X-ray powder diffraction and Mossbauer spectroscopy. The Rietveld refinement of the X-ray diffract
Autor:
Raúl W. Gómez, Jorge A. García-Macedo, Vivianne Marquina, Manuel Aguilar-Franco, J.L. Pérez-Mazariego, Guadalupe Valverde-Aguilar
Publikováno v:
Journal of Materials Science. 50:704-716
Hematite and maghemite nanoparticles embedded in silica and titanium dioxide matrices were obtained by sol–gel method. A mixture of precursor solutions of SiO2 and TiO2 doped with Fe3O4 salt templated by the addition of PEO–PPO–PEO triblock cop
Publikováno v:
Journal of molecular modeling. 23(1)
We report first-principles calculations carried out to analyze the adsorption of calcium on the outer surface of the fullerene C60, yielding [C60 + mCa]. Geometric optimization (GO) and molecular dynamics (MD) simulation were performed using the plan
Publikováno v:
Journal of Molecular Modeling. 22
This paper inquires the C60 capabilities to contain radio-iodide ((131)I2) molecules. The encapsulation conditions are investigated applying first principles method to simulate with geometric optimizations and molecular dynamics at 310 K and atmosphe
Publikováno v:
European Journal of Physics. 33:1359-1365
The problem of a cylinder of mass m and radius r, with its centre of mass out of the cylinder’s axis, rolling on an inclined plane that makes an angle α with respect to the horizontal, is analysed. The equation of motion is partially solved to obt
Autor:
Emilio Morán, Raúl W. Gómez, F. González-García, Vivianne Marquina, Jesús Prado-Gonjal, J.L. Pérez-Mazariego, David Ávila, L. Fuentes, M.E. Villafuerte-Castrejón
Publikováno v:
Solid State Sciences. 13:2030-2036
Multiferroic BiFeO3 has been rapidly synthesized by a microwave – hydrothermal method using nitrates as the metallic source. Structural characterization was performed by thermal analysis, X-ray diffraction and transmission electron microscopy. Gene
Autor:
Jorge A. García-Macedo, J.L. Pérez-Mazariego, Guadalupe Valverde-Aguilar, Raúl W. Gómez, Vivianne Marquina
Publikováno v:
Journal of Nanoscience and Nanotechnology. 8:6491-6496
Sol-gel thin films containing Fe2o3 were deposited onto glass substrates by the dip-coating method at room temperature. Fe2O3 enriched with the isotope 57Fe was embedded in two kinds of matrices: zinc oxide (ZnO) and silica (SiO2). X-ray diffraction
Autor:
Jorge Garcia-Macedo, Guadalupe Valverde-Aguilar, Raúl W. Gómez, José L. Pérez-Mazariego, Vivianne Marquina
Publikováno v:
Journal of Nanoscience and Nanotechnology. 8:6491-6496
Sol–gel thin films containing Fe2O3 were deposited onto glass substrates by the dip-coating method at room temperature. Fe2O3 enriched with the isotope 57Fe was embedded in two kinds of matrices: zinc oxide (ZnO) and silica (SiO2). X-ray diffractio
Autor:
R. Saez Puche, Raúl W. Gómez, Ma. Luisa Marquina, Vivianne Marquina, V. Blanco Gutierrez, Rosalia Ridaura, J.L. Pérez Mazariego, M. J. Torralvo Fernandez
Publikováno v:
Boletín de la Sociedad Española de Cerámica y Vidrio. 47:133-137
Se han preparado mediante el metodo hidrotermal nanoparticulas de ferritas MFe2O4 (M = Ni, Zn). Las muestras obtenidas fueron caracterizadas mediante difraccion de rayos X y electrones, microscopia electronica de transmision y barrido y espectroscopi