Epitaxial growth of ZnO nanorods on electrospun ZnO nanofibers by hydrothermal method
In this paper, we report a new ZnO nanofibers-nanorods structure which was successfully prepared by the electrospun ZnO nanofibers as seed to guide hydrothermal epitaxial growth of the ZnO nanorods. The structure was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL). The XRD results indicate that ZnO nanofibers obtained at 600° have high crystallinity with a typical hexagonal wurtzite structure. Furthermore compared with the strongest diffraction of ZnO nanofibers in (101) plane, the diffraction from (002) plane of ZnO nanofibers-nanorods becomes the strongest. The SEM shows that the diameters of epitaxial-grown ZnO nanorods on ZnO nanofibers were approximately 100–200 nm. The PL spectrum shows that the ZnO nanofibers-nanorods have a broad green-yellow emission around 537 nm, in contrast to that of ZnO nanofibers, the peak had obvious redshift about 24 nm and the luminous intensity weakened.
KeywordsEpitaxial Growth Composite Nanofibers Luminous Intensity Photoelectric Conversion Efficiency Zinc Acetate Solution
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