Journal
PROGRESS IN SOLID STATE CHEMISTRY
Volume 33, Issue 2-4, Pages 71-79Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.progsolidstchem.2005.11.002
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Hydrogenation of bis(ditrimethylsilyl)amido iron complex, [Fe{N(SiMe3)(2))(2)], provides iron nanoparticles (NPs) which have been stabilised either by an organic polymer matrix or mixtures of long chain acid and amine ligands leading respectively to spherical nanoparticles of 1.8 nm size or nanocubes with edges of 7.2 or 8.4 nm. The 1.8 nm size NPs are magnetically independent. Their magnetisation is shown to be identical to that of clusters of the same size prepared and measured in UHV conditions, i.e. strongly increased as compared to bulk value. These NPs have been structurally characterised and display an original structure different from the classical bee and fee structures encountered in bulk iron. On the reverse iron nanocubes display a bee structure and magnetic properties similar to those of bulk iron within experimental errors, in agreement with their larger size. These cubes crystallise into 3D superstructures. (C) 2005 Elsevier Ltd. All rights reserved.
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