One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles

Jriuan Lai, Kurikka V P M Shafi, Abraham Ulman, Katja Loos, Ronit Popovitz-Biro, Yongjae Lee, Thomas Vogt, Claude Estournès

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)5730-5731
Number of pages2
JournalJournal of the American Chemical Society
Volume127
Issue number16
DOIs
StatePublished - Apr 27 2005

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Nanoparticles
Metals
Synchrotrons
Electron energy loss spectroscopy
Carbon Monoxide
Stoichiometry
Powders
Iron
Crystal structure
Transmission electron microscopy
iron pentacarbonyl

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Lai, J., Shafi, K. V. P. M., Ulman, A., Loos, K., Popovitz-Biro, R., Lee, Y., ... Estournès, C. (2005). One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles. Journal of the American Chemical Society, 127(16), 5730-5731. https://doi.org/10.1021/ja0443225

One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles. / Lai, Jriuan; Shafi, Kurikka V P M; Ulman, Abraham; Loos, Katja; Popovitz-Biro, Ronit; Lee, Yongjae; Vogt, Thomas; Estournès, Claude.

In: Journal of the American Chemical Society, Vol. 127, No. 16, 27.04.2005, p. 5730-5731.

Research output: Contribution to journalArticle

Lai, J, Shafi, KVPM, Ulman, A, Loos, K, Popovitz-Biro, R, Lee, Y, Vogt, T & Estournès, C 2005, 'One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles', Journal of the American Chemical Society, vol. 127, no. 16, pp. 5730-5731. https://doi.org/10.1021/ja0443225
Lai, Jriuan ; Shafi, Kurikka V P M ; Ulman, Abraham ; Loos, Katja ; Popovitz-Biro, Ronit ; Lee, Yongjae ; Vogt, Thomas ; Estournès, Claude. / One-step synthesis of core(Cr)/shell(γ-Fe 2O 3) nanoparticles. In: Journal of the American Chemical Society. 2005 ; Vol. 127, No. 16. pp. 5730-5731.
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