Abstract
Fe particles with sizes in the range 1–5 nm, formed by a gas-aggregation method and deposited onto graphite and C60 supports, were studied by x-ray photoemission spectroscopy, x-ray absorption spectroscopy, and magnetic linear dichroism. Clusters deposited onto a C60 coated graphite substrate become embedded within the fullerene film, and have an increased resistance to oxidation compared to exposed clusters supported on a graphite surface. No evidence for hybridization between the electronic states of Fe and C60 is seen. The magnetic dichroism signal of the exposed clusters increases sharply with the film thickness because of the increased cluster interactions.
Highlights
SEPTEMBER 1999X-ray photoemission and absorption spectroscopy of supported nanoscale iron clusters
Nanoscale particles define a boundary between the atomic and the solid state
XPS, MLDAD, and XAS were used to characterize Fe clusters deposited onto two substrates: freshly cleaved highly oriented pyrolytic graphiteHOPG, and HOPG coated with a thick film of C60
Summary
X-ray photoemission and absorption spectroscopy of supported nanoscale iron clusters. Binnsb) Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, United KingdomReceived 5 April 1999; accepted for publication 5 April 1999͒
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