title: Getting to the core of the problem: origin of the luminescence from (Mg,Zn)O heterostructured nanowires.
abstract: We have measured the time-resolved, X-ray excited optical luminescence spectra from two types of MgxZn(1-x)O core-shell, heterostructured nanowires: type I, with a small x, wurtzite core, encased in a larger x, wurtzite sheath; and type II, with a wurtzite core (x approximately 0), encased in a rock-salt sheath (x>0.62). By monitoring the X-ray energy dependence of the various luminescence peaks, we have determined the local environment of the sites where these peaks originate.
authors.affiliation: Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA. rar@aps.anl.gov
authors.forename: Richard A
authors.initials: RA
authors.lastname: Rosenberg
authors.forename: Gopal K
authors.initials: GK
authors.lastname: Shenoy
authors.forename: Matthew F
authors.initials: MF
authors.lastname: Chisholm
authors.forename: Li-Chia
authors.initials: LC
authors.lastname: Tien
authors.forename: David
authors.initials: D
authors.lastname: Norton
authors.forename: Steven
authors.initials: S
authors.lastname: Pearton
mesh_terms: D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods; D046911:Macromolecular Substances / Q000737:chemistry; D008277:Magnesium Oxide / Q000737:chemistry* / Q000528:radiation effects; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D046911:Macromolecular Substances; D008277:Magnesium Oxide; D015034:Zinc Oxide