Effective medium theories for nanocomposite characterization
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/346033
Vídeo
Càtedra / Departament / Institut
Escola Universitària d'Òptica i Optometria de Terrassa
Tipus de documentAudiovisual
Data publicació2021-05-14
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
A methodology to retrieve the dielectric function of a nanocomposite from infrared spectroscopy is presented. The use of effective medium theories allows treating the optical response of a multi-phase composite as that of a single phase with an effective response that is a complex function of the components and their spatial arrangement. This methodology has been tested in a case study involving cerium oxide nanoparticles, whose vibrational properties are known to change significantly upon particle size reduction. Accurate values of its dielectric function in the infrared have been retrieved and used to analyse this phenomenon. The main goal of this study is to develop a systematic methodology for the study of the vibrational properties of nanomaterials. It is also intended that the development of effective medium models will be useful for designing new composite nanomaterials with improved optical properties (e.g., solar absorbers).
Document relacionathttp://hdl.handle.net/2117/346194
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