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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
Fernández Sánchez, Paloma ; Díaz-Guerra Viejo, Carlos ; López García, María Luisa ; Urbieta Quiroga, Ana Irene ; Nogales Díaz, Emilio ; Arias Velasco, Marta ; Romero Izquierdo, Carlos ; Solís Fernández, Fernando ; Sotillo Buzarra, Belén | 2019-10-31El presente proyecto aborda dos aspectos muy importantes y estrechamente ligados a la adquisición de competencias básicas de cualquier titulación de grado actual y altamente demandadas por los empleadores: la adquisición de habilidades para desa[...]texto impreso
Fernández Sánchez, Paloma ; López Orozco, José Antonio ; Maestre Varea, David ; Hidalgo Alcalde, Pedro ; Besada Portas, Eva ; Sotillo Buzarra, Belén ; Neira Gómez, Andrea Paulette ; Pereyra Ocampo, Laura Victoria ; de las Heras de la Campa, Pablo | 2016-04El juego como modo de aprendizaje es algo inherente no sólo al ser humano sino, en general, al reino animal. Para cualquier mamífero el juego constituye la forma de aprendizaje fundamental. A través del juego se aprende a luchar, a defenderse y [...]texto impreso
Castaldini, A. ; Cavallini, A. ; Fraboni, B. ; Polenta, L. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | American Physical Society | 1996-09-15Deep levels in Cd_(1-x)Zn_xTe have not yet been fully characterized and understood, even though this material is very promising for medical and optoelectronic applications. We have investigated p-type semi-insulating Cd_(0.8)Zn_(0.2)Te with cath[...]texto impreso
Garcia, J. A. ; Fernández Sánchez, Paloma ; Remon, A. ; Piqueras de Noriega, Javier ; Muñoz, V. ; Triboulet, R. | IOP publishing ltd | 2001-05Samples of zinc telluride bulk single crystals, which were deformed in uniaxial compression, have been studied by photoluminescence (PL) and cathodoluminescence (CL). As a particular feature the deformed samples present a PL emission band peaked[...]texto impreso
Urbieta Quiroga, Ana Irene ; Fernández Sánchez, Paloma ; Hardalo, C. ; Piqueras de Noriega, Javier ; Sekiguchi, T. | Elsevier Science SA | 2002-04-30Bulk ZnO single crystals grown by the hydrothermal (HTT) and alkali flux methods have been investigated by means of scanning tunnelling spectroscopy (STS) and time resolved cathodoluminescence (CL). Measurements were performed in the different c[...]texto impreso
Pal, U ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier ; Sochinskii, N. V. ; Dieguez, E. | Amer Inst Physics | 1995-08-01Cathodoluminescence (CL) microscopic techniques have been used to study the spatial distribution of structural defects and the deep levels in CdTe:Ge bulk crystals. The effect of Ge doping with concentrations of 10(17) and 10(19) cm(-3) on the c[...]texto impreso
Iribarren, A. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Academic Press Ltd- Elsevier Science Ltd | 2008-05ZnTe- and TeO_2-doped ZnO nanostructures and microstructures were obtained by a vapour-solid process by sintering compacted ZnO powder mixed with each precursor. Cathodoluminescence (CL) measurements show that if TeO_2 is used, then the defect b[...]texto impreso
Fernández Sánchez, Paloma ; Garcia, J. A. ; Remon, A ; Piqueras de Noriega, Javier ; Muñoz, V. ; Triboulet, R. | IOP publishing ltd | 1998-04ZnTe single crystals grown by the cold travelling heater method have been investigated by means of photo-and cathodoluminescence. The spectral region covered in this work ranges from 2.48 eV (500 nm) which corresponds to band-edge emission to 0.[...]texto impreso
Urbieta Quiroga, Ana Irene ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier ; Hardalov, C. ; Sekiguchi, T. | IOP publishing ltd | 2001-10-07Bulk ZnO single crystals grown by the hydrothermal and flux methods have been characterized by steady-state and time resolved cathodoluminescence measurements performed on the different crystalline faces. A shift of the peak near band edge towar[...]texto impreso
Piqueras de Noriega, Javier ; Sotillo Buzarra, Belén ; Fernández Sánchez, Paloma | Elsevier Science SA | 2013-06-25Vapor–solid (VS) growth method at temperatures in the range from 1000 °C to 1200 °C has been used to obtain In doped ZnS micro- and nanostructures. The morphologies of the synthesized structures depend strongly on the deposition temperature, con[...]texto impreso
Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier ; Sochinskii, N. V. ; Muñoz, V. ; Bernardi, S. | Amer Inst Physics | 1997-11-24CdTe(100)/GaAs(100) and CdTe(lll)/CdTe(lll) layers grown by metalorganic vapor phase epitaxy (MOVPE) were investigated The layers were recrystallized to improve their morphology by scanning the surface with a 100 mu m diameter spot from an Ar io[...]texto impreso
Cathodoluminescence study of semiconductor oxide micro- and nanostructures grown by vapor deposition
Piqueras de Noriega, Javier ; Maestre Varea, David ; Ortega Mallén, Yolanda ; Cremades Rodríguez, Ana Isabel ; Fernández Sánchez, Paloma | Wiley-Blackwell | 2008-07starting SnO_2, powder. In-rich nanoislands were found to grow on some edges of the tubes. ZnO nanostructures doped with Sri or Eu were grown by adding SnO_2 and Eu(2)O(3) powder, respectively, to the ZnO precursor powder. All the samples have b[...]texto impreso
Iribarren, A. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Springer Netherlands | 2008-04Sintering of a mixture of TeO_2 and ZnO powders under an Ar flux leads to the formation of elongated Te-doped ZnO nano- and microstructures on the sample surface. The growth of the structures occurs via a vapour-solid process. Cathodoluminescenc[...]texto impreso
Castaldini, A. ; Cavallini, A. ; Fraboni, B. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Amer Inst Physics | 1997We have investigated the electrical and optical properties of the deep levels responsible for the 1.4-1.5 eV luminescence band usually observed in II-VI compounds. We compared the energy levels found by cathodoluminescence and junction spectrosc[...]
