Repositório Institucional da Universidade de Aveiro > Departamento de Química > DQ - Artigos >
 Luminescent SiO(2)-coated Gd(2)O(3):Eu(3+) nanorods/poly(styrene) nanocomposites by in situ polymerization
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6258

title: Luminescent SiO(2)-coated Gd(2)O(3):Eu(3+) nanorods/poly(styrene) nanocomposites by in situ polymerization
authors: Macedo, Andreia G.
Martins, Manuel A.
Fernandes, Silvia E. M.
Barros-Timmons, Ana
Trindade, Tito
Carlos, Luis D.
Rocha, Joao
keywords: Europium
Gadolinium oxide
issue date: Oct-2010
publisher: Elsevier
abstract: Europium doped gadolinium oxide nanorods have been coated with silica via a sol–gel approach. The silica coating increases the Eu3+ absolute emission quantum yields from 0.51 to 0.86 (255 nm excitation) and decay times from 1.43 to 1.80 ms (394.4 nm excitation). Subsequently the silica coating was modified with 3-(trimethoxysilyl)-propyl-methacrylate. Grafting of silica with the MPS coupling agent was confirmed by FTIR and contact angle measurements. The functionalized nanoparticles were used as core structures in the in situ radical polymerization of styrene via miniemulsion and solution routes. Depending on the polymerization technique used the morphology of the polymer coating consisted in isolated spheres or a homogenous film respectively. Although the optical properties of the ensuing nanocomposites were reduced the synthetic strategy developed to process this type of luminescent nanoparticles proved efficient and can be explored using different vinyl or (meth)acrylate monomers.
URI: http://hdl.handle.net/10773/6258
ISSN: 0925-3467
publisher version/DOI: dx.doi.org/10.1016/j.optmat.2010.05.020
source: Optical Materials
appears in collectionsDQ - Artigos

files in this item

file description sizeformat
Optical Materials 32 (2010) 1622.pdf909.27 kBAdobe PDFview/open
Restrict Access. You can Request a copy!

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! RCAAP OpenAIRE DeGóis
ria-repositorio@ua.pt - Copyright ©   Universidade de Aveiro - RIA Statistics - Powered by MIT's DSpace software, Version 1.6.2