LAUSR

ZnO nanobelts grow with their polar axis perpendicular to growth direction. Heterostructure nanobelts may therefore contain hetero-interfaces along the polar axis of ZnO where polarization mismatch may induce electron confinement. We demonstrate the growth of such heterostructure nanobelts and investigate the effects of shell-growth temperature on nano-heterostructures using photoluminescence and secondary ion mass spectrometry in a focussed ion-beam microscope with a N+as the primary ion beam. We perform ow temperature photoluminescence on ensembles of such heterostructures and single nanostructure. We show how single nanobelts have photoluminescence spectra rich in features and attribute these to band misalignment at ZnO/ZnMgO interfaces embedded within nano-heterostructures.