Figure 3From: Enhanced band-edge photoluminescence from ZnO-passivated ZnO nanoflowers by atomic layer depositionSEM images of different samples with varying magnifications. (a,b) The as-grown ZnO nanoflowers; (c,d) the nanoflowers coated by a ZnO thin film with a thickness of 15 nm by ALD; (e,f) the nanoflowers coated by the ZnO thin films with the thicknesses of 30 and 45 nm, respectively.Back to article page