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One-Step Synthesis of Core(Cr)/Shell(γ-Fe2O3) Nanoparticles

Lai, Jriuan and Shafi, Kurikka V. P. M. and Ulman, Abraham and Loos, Katja and Popovitz-Biro, Ronit and Lee, Yongjae and Vogt, Thomas and Estournès, Claude One-Step Synthesis of Core(Cr)/Shell(γ-Fe2O3) Nanoparticles. (2005) Journal of the American Chemical Society, 127 (16). 5730-5731. ISSN 0002-7863

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Official URL: https://doi.org/10.1021/ja0443225

Abstract

Core(Cr)/shell(γ-Fe2O3) nanoparticles were synthesized by mixing Fe(CO)5 and Cr(CO)6 in the 9:1 ratio. These particles exhibit narrow size distribution with 13.5 nm as mean diameter and uniform spherical shape. The TEM image, which is in good agreement with the synchrotron powder XRD pattern, reveals the heterogeneous nature (core/shell structure). The analysis of the pattern reveals γ-Fe2O3 structure and a metal crystal structure. Mössbauer spectra, which support the superparamagnetic behavior determined by H−M measurement, do not show any traceable amount of Fe0. This suggests that the metal component is Cr. EELS analysis and iron mapping suggest controlled stoichiometry and also confirm a core made of Cr and a shell made of γ-Fe2O3.

Item Type:Article
HAL Id:hal-02295841
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Polytechnic Institute of New York University (USA)
Other partners > Université de Strasbourg - UNISTRA (FRANCE)
Other partners > University of Groningen (NETHERLANDS)
Other partners > Weizmann Institute of Science (ISRAEL)
Other partners > Brookhaven National Laboratory - BNL (USA)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:24 Sep 2019 13:08

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