Effect of Sb-doping on the morphology and dielectric properties of chrysanthemum-like ZnO nanowire clusters

Chrysanthemum-like ZnO nanowire clusters with different Sb-doping concentrations were prepared using a hy- drothermal process. The microstructures, morphologies, and dielectric properties of the as-prepared products were characterized by X-ray diffraction （XRD）, high-resolution transmission electron microscopy （HRTEM）, field emission environment scanning electron microscope （FEESEM）, and microwave vector network analyzer respectively. The results indicate that the as-prepared products are Sb-doped ZnO single crystallines with a hexagonal wurtzite structure, the flower bud saturation degree Fd is obviously different from that of the pure ZnO nanowire clusters, the good dielectric loss property is found in Sb-doped ZnO products with low density, and the dielectric loss tangent tanSe increases with the increase of the Sb-doping concentration in a certain concentration range.

Effect of Mn-doping on the growth mechanism and electromagnetic properties of chrysanthemum-like ZnO nanowire clusters

Chrysanthemum-like ZnO nanowire clusters with different Mn-doping concentrations are prepared by a hydrothermal process. The microstructnre, morphology and electromagnetic properties are characterized by x-ray diffractometer high-resolution transmission electron microscopy （HRTEM）, a field emission environment scanning electron microscope （FEESEM） and a microwave vector network analyser respectively. The experimental results indicate that the as- prepared products are Mn-doped ZnO single crystalline with a hexagonal wurtzite structure, that the growth habit changes due to Mn-doping and that a good magnetic loss property is found in the Mn-doped ZnO products, and the average magnetic loss tangent tandm is up to 0.170099 for 3% Mn-doping, while the dielectric loss tangent tande is weakened, owing to the fact that ions Mn2＋ enter the crystal lattice of ZnO.