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    Electronic structure of nanoscale iron oxide particles measured by scanning tunneling and photoelectron spectroscopies

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    Genre
    Journal Article
    Date
    2005-12-14
    Author
    Preisinger, M
    Krispin, M
    Rudolf, T
    Horn, S
    Strongin, DR
    Subject
    cond-mat.mtrl-sci
    cond-mat.mtrl-sci
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/6116
    
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    DOI
    10.1103/PhysRevB.71.165409
    Abstract
    We have investigated the electronic structure of nanosized iron oxide by scanning tunneling microscopy and spectroscopy as well as by photoelectron spectroscopy. The nanoparticles were produced by the thermal treatment of ferritin molecules containing a self-assembled core of iron oxide. Depending on the thermal treatment we were able to prepare different phases of iron oxide nanoparticles resembling γ- Fe2 O3, α- Fe2 O3, and a phase which apparently contains both γ- Fe2 O3 and α- Fe2 O3. The changes to the electronic structure of these materials were studied under reducing conditions. We show that the surface band gap of the electronic excitation spectrum can differ from that of bulk material and is dominated by surface effects. © 2005 The American Physical Society.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review B - Condensed Matter and Materials Physics
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/6098
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