TY - JOUR
T1 - One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles
AU - Lai, Jriuan
AU - Shafi, Kurikka V.P.M.
AU - Ulman, Abraham
AU - Loos, Katja
AU - Popovitz-Biro, Ronit
AU - Lee, Yongjae
AU - Vogt, Thomas
AU - Estournès, Claude
PY - 2005/4/27
Y1 - 2005/4/27
N2 - Core(Cr)/shell(γ-Fe 2O 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 γ-Fe 2O 3 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-Fe 2O 3.
AB - Core(Cr)/shell(γ-Fe 2O 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 γ-Fe 2O 3 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-Fe 2O 3.
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U2 - 10.1021/ja0443225
DO - 10.1021/ja0443225
M3 - Article
C2 - 15839638
AN - SCOPUS:17744389609
SN - 0002-7863
VL - 127
SP - 5730
EP - 5731
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 16
ER -