Pan Hui, Liu Binghai, Yi Jiabao, Poh Cheekok, Lim Sanhua, Ding Jun, Feng Yuanping, Huan C H A, Lin Jianyi
Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.
J Phys Chem B. 2005 Mar 3;109(8):3094-8. doi: 10.1021/jp0451997.
Single-crystalline Ni nanowires have been successfully fabricated with anodic aluminum oxide as template by electrodeposition. Structural characterization (X-ray diffraction, XRD, and high-resolution transmission electron microscopy, HRTEM) shows that the single-crystalline Ni nanowire has a preferred orientation along the [220] direction. The effects of electrochemical deposition conditions on the structure of Ni nanowires are systematically studied to investigate the growth mechanism. Possible reasons for the growth of the single-crystalline Ni nanowires were discussed on the basis of electrochemistry and thermodynamics. These single-crystalline Ni nanowires have exhibited excellent magnetic properties (large anisotropy, large coercivity, and high remanence). By a similar process, single-crystalline Co nanowires with hexagonal close-packed (hcp) structure were achieved, also having large anisotropy, large coercivity (1.8 kOe), and high remanence ratio (80.8%).
以阳极氧化铝为模板，通过电沉积成功制备了单晶镍纳米线。结构表征（X射线衍射，XRD，以及高分辨率透射电子显微镜，HRTEM）表明，单晶镍纳米线沿[220]方向具有择优取向。系统研究了电化学沉积条件对镍纳米线结构的影响，以探究其生长机制。基于电化学和热力学讨论了单晶镍纳米线生长的可能原因。这些单晶镍纳米线表现出优异的磁性能（大各向异性、大矫顽力和高剩磁）。通过类似的过程，获得了具有六方密排（hcp）结构的单晶钴纳米线，同样具有大各向异性、大矫顽力（1.8 kOe）和高剩磁比（80.8%）。
