Morphology Controlled Synthesis of ZnO Nanostructures on Different Substrates
Owing to its special photoelectric properties, ZnO nanostructrues have attracted extensive attention. Here we reported a study
on the effect of substrates and seeding layers’ thickness on the morphology of the resultant ZnO nanostructures. The atomic layer deposition
(ALD) was used to pre-synthesized seed layers on different substrates, including polyethylene terephthalate (PET), graphene/PET,
Ag/PET, Al/PET and Al2O3/PET. Chemical solution route was employed to synthesize ZnO nanostructures. When the thickness of seed
layers was 10 nm, nanorods, nanowalls and nanosheets were obtained. Nevertheless, when the thickness of seed layer was increased to
100 nm, well-aligned ZnO nanorods with homogeneous dimension were achieved on all the studied substrates. The possible growth
mechanism of ZnO nanostructure was discussed and a feasible way to control the morphology and structure of ZnO was proposed.
Keywords: ZnO, nanorods, nanowalls, nanosheets, substrates, morphology.
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