Synthesis and characterization of a sol-gel derived ureasilicate hybrid organic...

• Autor(es): Boev, Victor I. ; Silva, C. J. R. ; Hungerford, Graham ; Gomes, M. J. M.
• Data: 2004
• Identificador Persistente: http://hdl.handle.net/1822/1989
• Origem: RepositóriUM - Universidade do Minho
• Assunto(s): CdS; Nanoparticles; Sol-gel; Ureasilicate; Photoluminescence
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

A hybrid organic-inorganic material filled with in situ generated inorganic particles has been synthesised by the homogeneous precipitation of CdS from aqueous solutions of Cd(NO3)2 and CH3CSNH2 . These highly transparent, homogeneous and flexible CdS doped xerogels were prepared by the sol-gel technique using, as precursors, organically modified silicon alkoxide (3-isocyanatepropyltriethoxysilane) and a di-amine functionalized oligopolyoxyethylene (Jeffamine ED-600), which by subsequent hydrolysis and condensation processes formed a solid 3-D network. TEM studies indicate the presence of round nanoparticles around 20 nm in diameter dispersed in a homogeneous amorphous matrix. The samples were also characterized by spectroscopic (UV-visible and photoluminescence) and XRD techniques.