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Proceedings Paper

Synthesis and characterization of core@shell (ZnO@gamma-Fe2O3) structured nanoparticles with two morphologies
Author(s): Imen Balti; Laila Samia Smiri; Pierre Rabu; Philippe Léone; Eric Gautron; Bruno Viana; Noureddine Jouini
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Paper Abstract

Core-shell ZnO/γ-Fe2O3 nanoparticles were prepared via a simple method using forced hydrolysis of acetate metallic salts in a polyol medium. Two types of morphologies can be easily obtained: (i) quasi-spherical ZnO core 20 nm in diameter coated with a continuous shell with 3 nm in length, (ii) rod-like ZnO decorated with γ-Fe2O3 nanoparticles. The ZnO nanorods are 80 nm in diameter and 400 nm in length. The maghemite (γ-Fe2O3) nanoparticles with 5 nm in diameter are strongly bonded to ZnO, well separated from each other and form a monolayer on the surface of ZnO nanorods. In both systems, coating ZnO by γ-Fe2O3 inhibits the surface defects and thus enhances the UV luminescence. The two systems present a superparamagnetic behavior with blocking temperature depending on the morphology: the decorated ZnO nanorods present a blocking temperature around 6 K whereas this temperature is significantly higher (300 K) for spherical core-shell nanoparticles.

Paper Details

Date Published: 18 March 2013
PDF: 6 pages
Proc. SPIE 8626, Oxide-based Materials and Devices IV, 86261G (18 March 2013); doi: 10.1117/12.2002862
Show Author Affiliations
Imen Balti, Univ. of Carthage (Tunisia)
LSPM, CNRS (France)
Laila Samia Smiri, Univ. of Carthage (Tunisia)
Pierre Rabu, Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS (France)
Philippe Léone, Institut des Matériaux Jean Rouxel, CNRS (France)
Eric Gautron, Institut des Matériaux Jean Rouxel, CNRS (France)
Bruno Viana, LCMCP, CNRS (France)
Noureddine Jouini, LSPM, CNRS (France)

Published in SPIE Proceedings Vol. 8626:
Oxide-based Materials and Devices IV
Ferechteh Hosseini Teherani; David C. Look; David J. Rogers, Editor(s)

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