title: Long-term oxidization and phase transition of InN nanotextures.
abstract: The long-term (6 months) oxidization of hcp-InN (wurtzite, InN-w) nanostructures (crystalline/amorphous) synthesized on Si [100] substrates is analyzed. The densely packed layers of InN-w nanostructures (5-40 nm) are shown to be oxidized by atmospheric oxygen via the formation of an intermediate amorphous In-Ox-Ny (indium oxynitride) phase to a final bi-phase hcp-InN/bcc-In2O3 nanotexture. High-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, electron energy loss spectroscopy and selected area electron diffraction are used to identify amorphous In-Ox-Ny oxynitride phase. When the oxidized area exceeds the critical size of 5 nm, the amorphous In-Ox-Ny phase eventually undergoes phase transition via a slow chemical reaction of atomic oxygen with the indium atoms, forming a single bcc In2O3 phase.
authors.affiliation: National Hellenic Research Foundation, Theoretical and Physical Chemistry Institute, 48 Vassileos Constantinou Avenue, Athens 11635, Greece. esarant@eie.gr.
authors.forename: Evangelia
authors.initials: E
authors.lastname: Sarantopoulou
authors.forename: Zoe
authors.initials: Z
authors.lastname: Kollia
authors.forename: Goran
authors.initials: G
authors.lastname: Dražic
authors.forename: Spomenka
authors.initials: S
authors.lastname: Kobe
authors.forename: Nicolaos Spyropoulos
authors.initials: NS
authors.lastname: Antonakakis