One-step synthesis of core(Cr)/shell(gamma-Fe2O3) nanoparticles
In: Journal of the American Chemical Society, Jg. 127 (2005-04-27), Heft 16, S. 5730-5731
Online
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Zugriff:
Core(Cr)/shell(gamma-Fe(2)O(3)) 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 gamma-Fe(2)O(3) structure and a metal crystal structure. Mossbauer spectra, which support the superparamagnetic behavior determined by H-M measurement, do not show any traceable amount of Fe(0). 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 gamma-Fe(2)O(3).
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One-step synthesis of core(Cr)/shell(gamma-Fe2O3) nanoparticles
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| Autor/in / Beteiligte Person: | Vogt, Thomas ; Estournès, Claude ; Loos, Katja ; Kurikka V.P.M. Shafi ; Lee, Yongjae ; Popovitz-Biro, Ronit ; Ulman, Abraham ; Lai, Jriuan ; Centre National de la Recherche Scientifique - CNRS (FRANCE) ; Polytechnic Institute of New York University (USA) ; Université de Strasbourg - UNISTRA (FRANCE) ; University of Groningen (NETHERLANDS) ; Weizmann Institute of Science (ISRAEL) ; Brookhaven National Laboratory - BNL (USA) ; Institut de Physique et Chimie des Matériaux de Strasbourg - IPCMS (Strasbourg, France) ; Polytechnic Institute of New York University ; University of Groningen [Groningen] ; Weizmann Institute of Science [Rehovot, Israël] ; Brookhaven National Laboratory [Upton, NY] (BNL) ; U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU) ; State University of New York (SUNY)-State University of New York (SUNY) ; Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) ; Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS) ; Faculty of Science and Engineering ; Macromolecular Chemistry & New Polymeric Materials ; Polymers at Surfaces and Interfaces ; Zernike Institute for Advanced Materials |
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| Zeitschrift: | Journal of the American Chemical Society, Jg. 127 (2005-04-27), Heft 16, S. 5730-5731 |
| Veröffentlichung: | AMER CHEMICAL SOC, 2005 |
| Medientyp: | unknown |
| ISSN: | 0002-7863 (print) ; 1520-5126 (print) |
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