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Magnetic, electronic, and structural characterization of nonstoichiometric iron oxides at the nanoscale

Franz X Redl1, Charles T Black, Georgia C Papaefthymiou

  • 1T. J. Watson Research Center, Nanoscale Materials and Devices, IBM, 1101 Kitchawan Road, Route 134, P.O. Box 218, Yorktown Heights, New York 10598, USA.

Journal of the American Chemical Society
|November 4, 2004
PubMed

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When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.