Fabrication and magnetic properties of metallic nanowires via AAO templates |
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Authors: | S Thongmee J Ding JY Lin |
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Institution: | a Department of Materials Science and Engineering, National University of Singapore, 117576, Singapore b Department of Physics, National University of Singapore, 117560, Singapore c Institute of Chemical and Engineering Sciences, 627833, Singapore |
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Abstract: | Metallic (Ni, Co, Cu and Fe) nanowires were fabricated by electrodeposition into anodic aluminum oxide (AAO) template. In this work, we have studied the effect of the electrode potential on the microstructure and magnetic properties of nanowires. Transmission electron microscopy (TEM) results showed that the metal nanowires were single-crystal. Cu and Ni nanowires had the same orientation along the 2 2 0] direction, while Co had a preferred orientation along the 1 0 0] direction. Fe nanowires had a preferred orientation along the 2 0 0] direction. The growth mechanisms are probably due to the competition growth of the adjacent grains and the confinement of growth in the nano-sized hole of the AAO template. Results showed that single crystal or highly textured nanowires had better magnetic properties compared with that of polycrystal nanowires in terms of coercivity and squareness. |
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Keywords: | Anodic aluminum oxide (AAO) template Ni Co Fe and Cu nanowires |
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