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Flexible ureasil hybrids with tailored optical properties through doping with metal nanoparticles

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Detalhes bibliográficos
Resumo:Hybrid organic-inorganic nanocomposites containing uniform distributions of metal nanoparticles have been prepared by mixing a pre-formed nanoparticle colloid with the precursors of a ureasil, prior to the sol-gel transition. These nanocomposites possess not only high optical quality and optical features dictated by the size and shape of the nanoparticle dopants, but also a high degree of flexibility, which can largely enhance the range of applications in practical devices. The deposition of a uniform silica shell on the nanoparticles surface prior to the sol-gel transition was found to be required to maintain the colloidal stability during the process and thus to retain the optical properties in the final nanocomposite material. This method can be readily extended to other materials, such as semiconductor and magnetic nanoparticles.
Autores principais:Boev, Victor Ivanov
Outros Autores:Perez-Juste, Jorge; Pastoriza-Santos, Isabel; Silva, Carlos J. R.; Gomes, M. J. M.; Liz-Marzan, Luis. M.
Assunto:Sol-gel Hybrid Nanoarticles
Ano:2004
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso restrito
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho
Descrição
Resumo:Hybrid organic-inorganic nanocomposites containing uniform distributions of metal nanoparticles have been prepared by mixing a pre-formed nanoparticle colloid with the precursors of a ureasil, prior to the sol-gel transition. These nanocomposites possess not only high optical quality and optical features dictated by the size and shape of the nanoparticle dopants, but also a high degree of flexibility, which can largely enhance the range of applications in practical devices. The deposition of a uniform silica shell on the nanoparticles surface prior to the sol-gel transition was found to be required to maintain the colloidal stability during the process and thus to retain the optical properties in the final nanocomposite material. This method can be readily extended to other materials, such as semiconductor and magnetic nanoparticles.