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Doctoral Thesis
DOI
10.11606/T.75.2003.tde-23062005-231741
Document
Author
Full name
Eduardo Perini Muniz
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2002
Supervisor
Committee
Trsic, Milan (President)
Aroca, Ricardo
Custódio, Rogério
Rodrigues Filho, Ubirajara Pereira
Temperini, Marcia Laudelina Arruda
Title in Portuguese
Absorção Óptica Aumentada de Elipsóides Metálicos Cobertos com uma Camada Orgânica na Região do Infravermelho
Keywords in Portuguese
Espectroscopia Aumentada por Superfícies Infravermelho Nanopartícula
Abstract in Portuguese
Foi estudada a absorção da luz por partículas metálicas esferoidais, filmes metálicos finos e filmes metálicos finos cobertos com uma camada de material orgânico nas regiões espectrais do visível e do infravermelho. A dependência das características dos picos de absorção de luz por partículas metálicas para com a forma e o tipo de material foi analisada. Modelos para o estudo de filmes metálicos finos foram deduzidos, a aproximação por rede de dipolos foi escolhida e resultados obtidos com o uso desta teoria foram comparados com resultados experimentais e com resultados teóricos encontrados na literatura. Um modelo para o estudo de filmes metálicos cobertos com uma camada de material orgânico foi proposto e sua consistência e utilidade foram testadas. Computações foram efetuadas usando o programa Maple.
Title in English
Surface Enhanced Infrared Absorption of Light by Metalic Elipsoids Covered with an Organic Layer.
Keywords in English
Surface Enhanced Spectroscopy Infrared Nanoparticles
Abstract in English
The absorption of light in the visible and infrared spectral regions by spheroidal metal particles, thin metallic films and thin metallic films covered with organic layers was studied. The dependence of the intensity and frequency of the peaks of absorption of light by metal particles with the shape and the kind of metal was studied. Models for the study of thin metallic films were deduced, the net dipole approximation is chosen and results obtained with it are compared with experimental results and with results obtained with a Maxwell-Garnett type theory. A model for the study of metallic films covered with organic layers was proposed and tested for consistency and utility. Computations were carried out using Maple.
 
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Tese_dout.pdf (2.55 Mbytes)
Publishing Date
2006-03-24
 
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