title: Dispersion of luminescent nanoparticles in different derivatives of poly(ethyl methacrylate).
abstract: Gd2O3:Tb(5%) nanoparticles were prepared via the polyol route and dispersed without any stabilizer in several ethyl methacrylate derivatives matrices such as poly(ethyl methacrylate), poly(2-methoxyethyl methacrylate) and poly(2-hydroxyethyl methacrylate) (PHEMA). Nanocomposites were obtained via free-radical polymerization of methacrylic monomers with ethylene glycol dimethacrylate as crosslinker and colloidal solution of Gd2O3:Tb(5%) nanoparticles. Best results are obtained with PHEMA in which the dispersed Gd2O3:Tb(5%) nanoparticles are spherical with a mean diameter of 15 nm, as measured by TEM. The obtained solid Gd2O3:Tb(5%)/PHEMA nanocomposites are highly transparent (in the visible spectral range) and exhibit characteristic photoluminescence of Tb3+ 5D4-7F(J) (J = 6-3), with 5D4-7F5 strong green emission at 536 nm upon UV excitation. The nanoparticles and nanocomposites have been well characterized by high-resolution transmission electron microscope (TEM), UV/Vis transmission spectra, photoluminescence excitation, and emission spectra.
authors.affiliation: LPPI, Fédération Institut des Matériaux (FD 4122), Université de Cergy-Pontoise, 5 mail Gay-Lussac, Neuville-sur-Oise, 95031 Cergy-Pontoise cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Davion
authors.forename: V
authors.initials: V
authors.lastname: Delhorbe
authors.forename: S P
authors.initials: SP
authors.lastname: Péralta
authors.forename: F
authors.initials: F
authors.lastname: Goubard
authors.forename: F
authors.initials: F
authors.lastname: Vidal
mesh_terms: D003102:Colloids / Q000737:chemistry*; D008163:Luminescent Measurements; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011102:Polyhydroxyethyl Methacrylate / Q000737:chemistry*
chemical_list: D003102:Colloids; D011102:Polyhydroxyethyl Methacrylate