Synthesis and characterization of core@shell (ZnO@gamma-Fe2O3) structured nanoparticles with two morphologies

Imen Balti; Laila Samia Smiri; Pierre Rabu; Philippe Léone; Eric Gautron; Bruno Viana; Noureddine Jouini

doi:10.1117/12.2002862

18 March 2013 Synthesis and characterization of core@shell (ZnO@γ-Fe₂O₃) structured nanoparticles with two morphologies

Imen Balti, Laila Samia Smiri, Pierre Rabu, Philippe Léone, Eric Gautron, Bruno Viana, Noureddine Jouini

Proceedings Volume 8626, Oxide-based Materials and Devices IV; 86261G (2013) https://doi.org/10.1117/12.2002862
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

Citation Download Citation

Imen Balti, Laila Samia Smiri, Pierre Rabu, Philippe Léone, Eric Gautron, Bruno Viana, and Noureddine Jouini "Synthesis and characterization of core@shell (ZnO@γ-Fe₂O₃) structured nanoparticles with two morphologies", Proc. SPIE 8626, Oxide-based Materials and Devices IV, 86261G (18 March 2013); https://doi.org/10.1117/12.2002862

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