Abstract
A novel chemical solution approach has been developed to synthesize ZnO based sulfide coaxialnanocables such as ZnO/ZnS and ZnO/CdS by chemical reaction in tetrahydrofuran (THF;C4H8O), in whichsulfur, NaBH4 and ZnCl2 or CdCl2 were used as reactants and ZnO nanorods were used as the template at room temperature.The morphology and structure of ZnO/ZnS and ZnO/CdS coaxial nanocables havebeen characterized by transmission electron microscopy (TEM), field emissionscanning electron microscopy (FESEM), x-ray powder diffraction (XRD), x-rayphotoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analysis.Furthermore, the as-prepared ZnO/CdS coaxial nanocables have been applied asNH3 gas sensors at room temperature with superior sensitivity, good reproducibility and a shortresponse/recovery time. Finally, a first explanation for the improved performance of theZnO/CdS coaxial nanocable based gas sensors has been presented.
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