Mixed iron-manganese oxide nanoparticles

Jriuan Lai, Kurikka V P M Shafi, Abraham Ulman, Katja Loos, Nan Loh Yang, Min-Hui Cui, Thomas Vogt, Claude Estournès, Dave C. Locke

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Designing nanoparticles for practical applications requires knowledge and control of how their desired properties relate to their composition and structure. Here, we present a detailed systematic study of mixed iron-manganese oxide nanoparticles, showing that ultrasonication provides the high-energy reaction conditions required for complete atomic level mixing of Fe(III) and Mn(III) when amorphous Fe 2O 3 nanoparticles are irradiated in the presence of Mn 2(CO) 10 in ambient atmosphere. X-ray diffraction (XRD) results reveal that the crystal structure of manganese iron mixed oxide nanoparticles changes from spinel to bixbyite with increasing of Mn(III) content. The results of room-temperature magnetization curves are consistent with the XRD patterns and spin density from electron paramagnetic resonance measurements, showing samples converting from superparamagnetic to antiferromagnetic, when the crystal structures of these samples transform from spinel to bixbyite.

Original languageEnglish (US)
Pages (from-to)14876-14883
Number of pages8
JournalJournal of Physical Chemistry B
Volume108
Issue number39
DOIs
StatePublished - Sep 30 2004
Externally publishedYes

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Manganese oxide
manganese oxides
iron oxides
Iron
Nanoparticles
nanoparticles
spinel
Crystal structure
X ray diffraction
crystal structure
mixed oxides
Carbon Monoxide
Manganese
Oxides
Diffraction patterns
Paramagnetic resonance
manganese
Magnetization
electron paramagnetic resonance
x rays

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Lai, J., Shafi, K. V. P. M., Ulman, A., Loos, K., Yang, N. L., Cui, M-H., ... Locke, D. C. (2004). Mixed iron-manganese oxide nanoparticles. Journal of Physical Chemistry B, 108(39), 14876-14883. https://doi.org/10.1021/jp049913w

Mixed iron-manganese oxide nanoparticles. / Lai, Jriuan; Shafi, Kurikka V P M; Ulman, Abraham; Loos, Katja; Yang, Nan Loh; Cui, Min-Hui; Vogt, Thomas; Estournès, Claude; Locke, Dave C.

In: Journal of Physical Chemistry B, Vol. 108, No. 39, 30.09.2004, p. 14876-14883.

Research output: Contribution to journalArticle

Lai, J, Shafi, KVPM, Ulman, A, Loos, K, Yang, NL, Cui, M-H, Vogt, T, Estournès, C & Locke, DC 2004, 'Mixed iron-manganese oxide nanoparticles', Journal of Physical Chemistry B, vol. 108, no. 39, pp. 14876-14883. https://doi.org/10.1021/jp049913w
Lai J, Shafi KVPM, Ulman A, Loos K, Yang NL, Cui M-H et al. Mixed iron-manganese oxide nanoparticles. Journal of Physical Chemistry B. 2004 Sep 30;108(39):14876-14883. https://doi.org/10.1021/jp049913w
Lai, Jriuan ; Shafi, Kurikka V P M ; Ulman, Abraham ; Loos, Katja ; Yang, Nan Loh ; Cui, Min-Hui ; Vogt, Thomas ; Estournès, Claude ; Locke, Dave C. / Mixed iron-manganese oxide nanoparticles. In: Journal of Physical Chemistry B. 2004 ; Vol. 108, No. 39. pp. 14876-14883.
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