| Ni、Co/AAO纳米有序阵列复合结构光吸收特性的比较研究 |
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| 引用本文： | 李燕,孙小伟,王建,徐洮,刘维民,力虎林,王成伟.Ni、Co/AAO纳米有序阵列复合结构光吸收特性的比较研究[J].光学学报,2005,25(1):7-82. |
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| 作者姓名： | 李燕 孙小伟 王建 徐洮 刘维民 力虎林 王成伟 |
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| 作者单位： | 西北师范大学物理与电子工程学院,兰州,730070;中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州,730000;兰州大学化学化工学院,兰州,730000 |
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| 基金项目： | 甘肃省自然科学基金(ZS021 A25 029 C)，西北师范大学二期科技创新工程项目(KJCXGC 214)资助课题 |
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| 摘 要： | 在多孔阳极氧化铝(AAO)模板中分别沉积金属镍(Ni)、钴(Co)，制备了Ni／AAO和Co／AAO纳米有序阵列复合结构，对其光吸收特性进行了比较研究。实验结果表明．相同结构参量的模板中，Ni、Co纳米粒子的表观形状随沉积时间的变化规律基本一致．但Co/AAO及Ni／AAO复合结构的光吸收特性却有较大差异。Ni／AAO复合结构表现出间接带隙半导体的光学特征．而Co／AAO复合结构具有直接带隙半导体的光学特征。同时，随金属沉积量的增加，Ni／AAO吸收边的红移量仅约为13nm．而Co/AAO复合结构的吸收边红移量却超过了80nm。用Maxwell-Garnett(M-G)理论分析了导致二者光吸收特性存在较大差异的主要原因。
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| 关 键 词： | 材料 纳米有序阵列 光吸收特性 吸收边 |
| 收稿时间： | 2003/12/29 |
Comparison Between the Optical Properties of Ni/AAO and Co/AAO Nano-Array Composite |
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| Li Yan,Sun Xiaowei,Wang Jian,Xu Tao,Liu WeiMin,Li Hulin,Wang Chengwei.Comparison Between the Optical Properties of Ni/AAO and Co/AAO Nano-Array Composite[J].Acta Optica Sinica,2005,25(1):7-82. |
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| Authors: | Li Yan Sun Xiaowei Wang Jian Xu Tao Liu WeiMin Li Hulin Wang Chengwei |
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| Institution: | Li Yan1 Sun Xiaowei1 Wang Jian1 Xu Tao2 Liu WeiMin2 Li Hulin3 Wang Chengwei1 1 College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070 2 State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,The Chinese Academy of Science,Lanzhou 730000 3 Department of Chemistry,Lanzhou University,Lanzhou 730000 |
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| Abstract: | OrderedNi/AAO and Co/AAO nano-array composite structure are prepared via electrodeposition of the metal within the process of anodically-grown porous anodic aluminum oxide (AAO) membranes. The optical properties of the two composite are studied. The results show that the difference between the Ni/AAO and Co/AAO are very large. Although the micrograph of the Ni nano-particles and the Co nano-particles are nearly the same, as the metal composition increasesd, the absorption band-edge of the Ni/AAO composite is small red-shifted (13 nm). However, the absorption band-edge of the Co/AAOcomposite is strongly red-shifted (80 nm). Meanwhile, the Ni/AAO and Co/AAO composite exhibit the optical features of the semiconductor with indirect and direct band gap respectively. |
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| Keywords: | materials nano-array composite optical absoption properties absorption band |
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