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Cobalt Ferrite Nanoparticles from Single and Multi‐Component Precursor Systems
Author(s) -
Mathur Sanjay,
Cavelius Christian,
Moh Karsten,
Shen Hao,
Bauer Jürgen
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900010
Subject(s) - nucleation , nanoparticle , materials science , thermal decomposition , cobalt , stoichiometry , chemical engineering , cobalt ferrite , ferrite (magnet) , boiling point , nanotechnology , chemistry , organic chemistry , metallurgy , composite material , engineering
Highly crystalline CoFe 2 O 4 nanoparticles (< d > ∼ 5.6 nm) were synthesized by thermal decomposition of (i) single molecular precursor CoFe 2 (O t Bu) 8 and (ii) stoichiometric mixture of individual metal precursors. The precursors were thermolyzed in a high‐boiling solvent (Docosane, bp. 369 °C) to produce uniformly dispersed cobalt ferrite nanoparticles in the case of molecular precursor, whereas bimodal distribution of nanoparticles was obtained in the multi‐source synthesis. TG/DSC and HR‐TEM reveraled single‐ and multi‐step decomposition profiles and differential nucleation steps in the two cases, which influence size dispersion and phase purity.