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Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | American Institute of Physics | 2009-03-01Al doped ZnO arrays of nanoplates and of ordered nanoneedles have been grown by a thermal evaporation-deposition method. The nanoplates, which have mainly triangular shape. Interpenetrating triangles and crossing of the triangles with other plan[...]texto impreso
Cediel Carracedo, Mario ; Díaz Mateos, Raúl ; Díaz Ramírez, Sergio ; Carmona Tejero, Noemi ; Ortega Villafuerte, Yanicet | UCM | 2020-09-21En este proyecto se incorporó un nuevo módulo al programa "Laboratorio Virtual de Materiales Cerámicos", dedicado al análisis estadístico de los esfuerzos de fractura a través de la función de probabilidad de Weibull.texto impreso
Piqueras de Noriega, Javier ; Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Jäger, Wolfgang ; Häußler , Dietrich | Wiley-V C H Verlag Gmbh | 2012-08Al-doped micro- and nanostructures have been grown by an evaporation–deposition method with a mixture of ZnS and Al_2O_3 powders as precursor. It has been found that the presence of Al is the cause of the growth of complex morphologies, as rods [...]texto impreso
Ortega Villafuerte, Yanicet ; Carmona Tejero, Noemi ; de Diego Otero, Nieves ; Rodríguez de la Fuente, Óscar | 2017-01El programa: Diseño e implementación de un laboratorio virtual para el estudio de "Defectos puntuales en cristales iónicos" enseña de forma interactiva las reglas de balance necesarias para escribir las ecuaciones de defectos en los cristales ió[...]texto impreso
Avila, J. ; Mascaraque Susunaga, Arantzazu ; Michel, E. G. ; Asensio, M. C. ; LeLay, G. ; Ortega Villafuerte, Yanicet ; Perez, R. ; Flores, F. | American Physical Society | 1999-01-11The Sn/Ge(111) interface has been investigated across the 3 x 3 --> , root 3 x root 3 R30 degrees phase transition using core level and valence band photoemission spectroscopies. We find, both above and below the transition, two different compon[...]texto impreso
Piqueras de Noriega, Javier ; Alemán Llorente, Belén ; Ortega Villafuerte, Yanicet ; García Martínez, José Ángel | American Institute of Physics | 2011-07-01Fe dopedZnO nanowires,nanorods, and urchin-like nanostructures have been grown using an evaporation-deposition method with compacted mixtures of ZnS and Fe_2O_3 powders, with different Fe contents as precursors. Treatments at 950 °C under argon [...]texto impreso
Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Amer Scientific Publishers | 2010-01Rare-earth (RE) ions are widely investigated luminescent centers because their intraionic-4f transitions generate narrow and intense emission lines. In this work Eu doped ZnO nanoneedles have been grown, by a thermal evaporation-deposition metho[...]texto impreso
Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | IOP publishing ltd | 2007-03-21Sintering of a ZnO-SnO_2 mixture under argon flow leads to the growth of microrods on the sample surface, which are formed by oriented stacks of nanoplates. Energy dispersive spectroscopy and cathodoluminescence ( CL) in the scanning electron mi[...]texto impreso
Piqueras de Noriega, Javier ; Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Häußler, Dietrich ; Jäger, Wolfgang | IOP publishing ltd | 2013-10-02ZnO nanorods with Sn core regions grown by a thermal evaporation–deposition method from a mixture of SnO_2 and ZnS powders as precursors, are used to study the behaviour of liquid metal in the nanotubes' core regions and the formation of liquid [...]texto impreso
Piqueras de Noriega, Javier ; Sotillo Buzarra, Belén ; Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma | RSC Royal Society of Chemistry | 2013Pure and In-doped ZnS structures have been grown using a VS method. Thermal treatments have been performed at temperatures ranging from 1000 to 1200 °C, during 15 to 17 hours in a N_2 overpressure environment. Nanowires and nanoribbons are the m[...]texto impreso
Ortega Villafuerte, Yanicet ; Arredondo López, Aitor ; Panis Maramba, Carlo Dexter ; Peña Romero, Adrián ; Zhang, Tian Yao ; Pérez Aroca, Vicente ; García-Arisco Rivera, Jesús | 2019-06-26En este proyecto se adicionó un nuevo módulo al laboratorio virtual de materiales cerámicos, dedicado a las propiedades físicas de los materiales cerámicos.texto impreso
Piqueras de Noriega, Javier ; Fernández Sánchez, Paloma ; Ortega Villafuerte, Yanicet | IOP publishing ltd | 2011-08Al-doped ZnO nanorod networks and other microstructures have been grown by a thermal evaporation–deposition method with a mixture of ZnS and Al_2O_3 powders as precursor. Some of the grown structures consist of star-like arrays of nanorods arran[...]texto impreso
Ortega Villafuerte, Yanicet ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Elsever Science | 2009-03-15Sintering of a ZnS-SnO(2) mixture under argon flow leads to the growth of columnar nanoplate arrays as well as arrays of nanowires, nanorods and nanoplates with six-fold symmetry. The six-fold nanoplate structures correspond to a more advanced s[...]texto impreso
Piqueras de Noriega, Javier ; Ortega Villafuerte, Yanicet ; Urbieta Quiroga, Ana Irene ; Fernández Sánchez, Paloma | World Scientific Publ Co Pte Ltd | 2007Sintering of ZnO-SnO_2 and ZnO-MgO mixtures, with few at. % of Sn or Mg at 1280 C under argon flaw leads to the growth of microrods on the sample surface, which are formed by oriented stacks of nanoplates. Energy dispersive spectroscopy and cath[...]texto impreso
Leyva, A. ; Ramirez, F. J. ; Ortega Villafuerte, Yanicet ; Estrada, M. ; Cabal, A. ; Cerdeira, A. ; Díaz, A | Amer Inst Physics | 2000During the last years, much interest has been dedicated to the use of amorphous silicon PIN diodes as particle and radiation detectors for medical applications. This work presents the spectrometric characterization of PECVD high deposition rate [...]
