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Title: Atomic structure of embedded Fe nanoclusters as a function of host matrix material: a synchrotron radiation study
Authors: Baker, S.H.
Roy, Mervyn
Gurman, Steve J.
Louch, S.
Bleloch, A.
Binns, C.
First Published: 3-Nov-2004
Publisher: Institute of Physics
Citation: Journal of Physics: Condensed Matter, 2004, 16 (43), pp. 7813-7821.
Abstract: The atomic structure of Fe nanoclusters embedded in a range of matrix materials has been studied using synchrotron radiation. In particular, the effect of embedding the clusters in Ag, amorphous carbon (a-C) and a porous C60 matrix is investigated. The embedded cluster samples were prepared by co-deposition using a gas aggregation cluster source. Samples with both dilute and high-volume-filling fraction of clusters, at 4 and 40% respectively, were prepared. Fe K edge EXAFS measurements were used to probe the structure within the clusters. In a Ag matrix, the Fe clusters retain the b.c.c. structure of bulk Fe while in a-C there is evidence for both b.c.c. and f.c.c. structures in the clusters. These results are independent of cluster volume-filling fraction over the range investigated. When embedded in a porous C60 matrix, the Fe clusters oxidize to Fe2O3.
ISSN: 0953-8984
Type: Article
Description: This paper was published as Journal of Physics: Condensed Matter, 2004, 16 (43), pp. 7813-7821. It is available from Doi: 10.1088/0953-8984/16/43/020
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Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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