Luminescent SiO2-coated Gd2O3:Eu3+ nanorods/poly(styrene) nanocomposites by in situ polymerization
authors Macedo, AG; Martins, MA; Fernandes, SEM; Barros-Timmons, A; Trindade, T; Carlos, LD; Rocha, J
nationality International
journal OPTICAL MATERIALS
author keywords Europium; Gadolinium oxide; Nanotubes; Luminescence; Silica; Poly(styrene)
keywords OXIDE NANOTUBES; POLYSTYRENE
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. (C) 2010 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0925-3467
year published 2010
volume 32
issue 12
beginning page 1622
ending page 1628
digital object identifier (doi) 10.1016/j.optmat.2010.05.020
web of science category Materials Science, Multidisciplinary; Optics
subject category Materials Science; Optics
unique article identifier WOS:000283971200014
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 2.779
5 year journal impact factor 2.521
category normalized journal impact factor percentile 61.307
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg