A novel approach has been developed for the synthesis of SiO 2@Y 2O 3:Eu 3+ particles with core-shell structure. In this method the polymer shell is obtained by copolymerization of methacryl oxyethyl isocyanate onto silica particles which are chemically modified by 3-(trimethoxysilyl) propyl methacrylate. The grafted polymer acts as template to prepare the luminescent shell on silica particles. Then, the obtained silica-polymer core-shell particles are dispersed in a solution of Yttrium and Europium nitrates to allow a physical adsorption of the ions by the polymer shell. The sacrificial polymer shell will be removed by thermal treatment to obtain photoluminescent SiO 2@Y 2O 3:Eu 3+ core-shell particles. Results reveal that the intensity of photoluminescence of these core-shell particles is much higher than intensity of particles prepared without sacrificial polymer shell
SYNTHESIS OF PHOTOLUMINESCENT CORE-SHELL SILICA PARTICLES BY SACRIFICIAL POLYMER SHELL METHOD / Mehdi, Ghahari; Fabbri, Paola; Touradj, Ebadzadeh; Roya, Aghababazadeh; Francesco, Pilati; FREYDOON ALIKHANI, Hesari. - In: NANO. - ISSN 1793-2920. - ELETTRONICO. - 5:4(2010), pp. 221-229. [10.1142/S179329201000213X]
SYNTHESIS OF PHOTOLUMINESCENT CORE-SHELL SILICA PARTICLES BY SACRIFICIAL POLYMER SHELL METHOD
FABBRI, Paola;
2010
Abstract
A novel approach has been developed for the synthesis of SiO 2@Y 2O 3:Eu 3+ particles with core-shell structure. In this method the polymer shell is obtained by copolymerization of methacryl oxyethyl isocyanate onto silica particles which are chemically modified by 3-(trimethoxysilyl) propyl methacrylate. The grafted polymer acts as template to prepare the luminescent shell on silica particles. Then, the obtained silica-polymer core-shell particles are dispersed in a solution of Yttrium and Europium nitrates to allow a physical adsorption of the ions by the polymer shell. The sacrificial polymer shell will be removed by thermal treatment to obtain photoluminescent SiO 2@Y 2O 3:Eu 3+ core-shell particles. Results reveal that the intensity of photoluminescence of these core-shell particles is much higher than intensity of particles prepared without sacrificial polymer shell
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
