Catálogo de publicaciones - tesis
Título de Acceso Abierto
Estudio y aplicaciones de propiedades ópticas, magnéticas y de transporte de carga de nanocompuestos basados en membranas porosas
Luisina Forzani Roberto Román Koropecki Paula Gabriela Bercoff Marcelo Gabriel Stachiotti Laura Beatriz Steren Ana María Gennaro
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Resumen/Descripción – provisto por el repositorio digital
Nanostructured porous anodic alumina membranes (NPAA) and porous silicon under the forms of mesoporous (PS) and macroporous (MPS) silicon were studied and used as matrices in nanocomposites. We deposited nickel into NPAA pores to produce nanocomposites of alumina and nickel nanowires. This system allowed the study of the behavior of the alumina matrix and nanowires. We studied the anisotropy of the magnetic properties and their variation with temperature. Through X-ray diffraction experiments we found an anomalous behavior of the thermal expansion coefficient of the nano-composite that agrees with the magnetic results. On the other hand, hybrid optical microcavities were designed and manufactured from NPAA membranes and PS one-dimensional photonic crystals, using the best characteristics of each nanostructured material, achieving cavities with a high quality factor and relatively high transmittance. These devices serve as a platform for chemical sensors or biosensors based on photonic properties, with great sensitivity in the low wavelengths range. In addition, another type of micro-composite was studied by filling MPS pores with lipids. Using electron paramagnetic resonance spectroscopy, we studied the lipid behavior incorporating spin labels, verifying that an important part of the lipids are organized in cylindrical lipid bilayers forming nanotubes in the pore walls. This system can be considered as a platform for the study of thermotropic phase transitions of lipids in a confined environment.Palabras clave – provistas por el repositorio digital
Porous alumina; Magnetic nanowires; Porous silicon; Composite nanomaterials; Nanostructures; Hybrid sensor; Alúmina porosa; Nanohilos magnéticos; Silicio poroso; Nanomateriales compuestos; Nanoestructuras; Sensores híbridos
Disponibilidad
| Institución detectada | Año de publicación | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No requiere | 2019 | Biblioteca Virtual de la Universidad Nacional del Litoral (SNRD) |
|
Información
Tipo de recurso:
tesis
Idiomas de la publicación
- español castellano
País de edición
Argentina
Fecha de publicación
2019-08-26
