Highly textured Ni nanowire arrays were fabricated into anodic aluminum oxide （AAO） templates by pulse DC electrodeposi- tion. The applied voltage and pH value of electrolytes were found strongly affecting the micro...Highly textured Ni nanowire arrays were fabricated into anodic aluminum oxide （AAO） templates by pulse DC electrodeposi- tion. The applied voltage and pH value of electrolytes were found strongly affecting the microstrucmre and magnetic proper ties of Ni nanowire arrays. Low applied potential and pH value both prefer to form polycrystalline fcc Ni nanowires. Increas- ing the applied potential or pH value favors the Ni [220] texture and even eventually forms the [220] oriented single crystal Ni wires, while exorbitant potential and pH value will conversely weaken the texture of nanowires. The magnetic properties of Ni wires are closely related to the microstructure of Ni nanowire arrays and large coercivities more than 1000 Oe were achieved at single crystalline Ni nanowire arrays. The mechanisms for the effect of applied potential and pH value on the grain size, tex- ture and magnetic properties of Ni nanowire arrays have been discussed.展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 50801023, 51001044)Educational Commission of Hubei Province (Grant No. D20091008)the Scientific Research Foundation for the Returned Overseas Chinese Scholars (SRF for ROCS, SEM)
文摘Highly textured Ni nanowire arrays were fabricated into anodic aluminum oxide （AAO） templates by pulse DC electrodeposi- tion. The applied voltage and pH value of electrolytes were found strongly affecting the microstrucmre and magnetic proper ties of Ni nanowire arrays. Low applied potential and pH value both prefer to form polycrystalline fcc Ni nanowires. Increas- ing the applied potential or pH value favors the Ni [220] texture and even eventually forms the [220] oriented single crystal Ni wires, while exorbitant potential and pH value will conversely weaken the texture of nanowires. The magnetic properties of Ni wires are closely related to the microstructure of Ni nanowire arrays and large coercivities more than 1000 Oe were achieved at single crystalline Ni nanowire arrays. The mechanisms for the effect of applied potential and pH value on the grain size, tex- ture and magnetic properties of Ni nanowire arrays have been discussed.
