Fabrication And Performance Of Rare Earth-transitional Metal Oxides Nanowire Arrays

In this thesis, LaxZnyOz、LaxMnyOz、LaxFeyOz、LaxCuyOz、CexFeyOz and TbxOy nanowire arrays have been fabricated in the anodic aluminum oxide (AAO) template with chemical deposition reaction via suction filteration at subatmospheric. The SEM、TEM、XRD and EDS were employed to characterize their crystal structure, morphology and chemical composition, respectively. The vibrating sample magnetometer (VSM) was used to study the magnetic performances of LaxZnyOz、 LaxMnyOz、LaxFeyOz、LaxCuyOz、CexFeyOz and TbxOy nanowire arrays, and the fluorescence spectrophotometer (F-4500) was employed to study the fluorescence intensity of LaxCuyOz、CexFeyOz、TbxOy nanowire arrays doped with Tb, Eu or Sm.The mainly research results are as follow:1. The above nanowire arrays are all amorphous in structure, and their structure, morphology and chemical composition could be adjusted by reactant concentration, reaction time, subatmospheric of suction filtration, thermal decomposition temperature and the pore size of AAO template.2. There are obvious magnetic anisotropy of LaxZnyOz、LaxMnyOz、LaxFeyOz、 LaxCuyOz、CexFeyOz nanowire arrays with the applied magnetic field and their easy magnetized direction is parallel to the axis of nanowire except for LaxCuyOz, which is from the shape anistropy of nanowire arrays. The TbxOy nanowire array is paramagnetic with the applied magnetic field.3. The fluorescence intensities of LaxCuyOz、CexFeyOz nanowire arrays are related with the doped Tb, Eu or Sm within2-30mol%. The results indicated that there is the strongest fluorescence for LaxCuyOz nanowire arrays, when the optimum doping concentration of Tb, Eu is5mol%and that of Sm is30mol%. When the optimum doping concentration of Eu or Sm is10mol%and Tb is5mol%, the fluorescence of CexFeyOz nanowire arrays is the strongest. The LaxCuyOz or CexFeyOz nanowire array is fluorescence quenching, when Eu or Sm is respectively over the optimum doping concentration.4. The fluorescence intensity of TbxOy nanowire array is both influenced by the exciting light and the doping concentrations of Eu·or Sm. there are the strongest fluorescence peaks of TbxOy nanowire arrays, when the doping concentrations of Eu is2mol%, and the exciting light is respectively221nm,394nm. When the doping concentration of Sm is10mol%or20mol%, the exciting light is respectively221nm,405nm, there are the strongest fluorescence peaks of TbxOy nanowire array.