Physicochemical characterization and photoelectrochemical analysis of iron oxide films

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Abstract

Iron oxide films with a nanoporous structure were grown by anodizing sputter-deposited Fe in a fluoride containing ethylene glycol solution and annealed under air exposure at different temperatures. X-ray diffraction and Raman spectroscopy allowed to identify the presence of hematite and/or magnetite after thermal treatment for films annealed at T≥400 °C under air exposure. According to GDOES compositional depth profiles, the thermal treatment sensitively reduced the amount of fluoride species incorporated into the film during the anodizing process. A band gap value of ∼2.0 eV was estimated for all the investigated layers, while a flat band potential dependent on both the growth conditions as well as on the annealing temperature was estimated.
Original languageEnglish
Pages (from-to)3005-3014
Number of pages10
JournalJournal of Solid State Electrochemistry
Volume17
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Electrochemistry
  • Electrical and Electronic Engineering

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