Person:
Cremades Rodríguez, Ana Isabel

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First Name
Ana Isabel
Last Name
Cremades Rodríguez
URI
https://hdl.handle.net/20.500.14352/75041
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Físicas
Department
Area
Ciencia de los Materiales e Ingeniería Metalúrgica
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1998 - 199912000 - 20031
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Author: Plugaru, R × Has files: false ×

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    Cathodoluminescence from nanocrystalline silicon films in the scanning electron microscope
    (Solided State phenomena, 1998) Méndez Martín, Bianchi; Piqueras de Noriega, Javier; Plugaru, R; Craciun, G.; Nastase, N.; Cremades Rodríguez, Ana Isabel; Nogales Díaz, Emilio
    Luminescence emission of nanocrystalline silicon films has been studied by cathodoluminescence (CL) in the scanning electron microscope. As deposited films show visible luminescence with dominant blue band as well as a red band. The evolution of CL bands after implantation and anodization treatments is investigated. Our results suggest that the dominant blue band has a complex character with a component at 400 nm which appears related to quantum size effects.
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    Effect of thermal and mechanical treatments on the cathodoluminescence of tin and titanium oxides
    (Spatially resolved characterization of local phenomena in materials and nanostructures, 2003) Maestre Varea, David; Plugaru, R; Cremades Rodríguez, Ana Isabel; Piqueras de Noriega, Javier
    The luminescence of titanium oxide and tin oxide has been investigated by cathodoluminescence in the SEM, as a function of the structural changes induced by thermal treatments. The evolution of the luminescence of TiO2 rutile, anatase and mixture phase with the annealing temperature is related to the process of thermal induced grain texture and to transition of metastables phases to the stable rutile. The emission band is peaked at 480 nm for the composite phase and at 580 nm for anatase and rutile phases respectively. A broad band in the 520-560 nm region is present in the spectra of both anatase and rutile phase. Thermal annealing leads to a red shift of the luminescence emission, with the emission band peaked at around 820 nm. In sintered tin oxide the main emission bands appear centered at about 480 nm and 630 nm. The intensity of these bands increases with annealing temperature up to 1200degreesC, whereas for samples annealed at 1500degreesC these emissions are quenched. Mechanical ball milling has been used to produce nanocrystalline SnO_2 grains to investigate the influence of the presence of nanocrystals on the CL emission.