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Nano Lett. 2007 Jun;7(6):1521-5. Epub 2007 May 27.

Getting to the core of the problem: origin of the luminescence from (Mg,Zn)O heterostructured nanowires.

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  • 1Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.


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.

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