Using electrochemical deposition, Ni–P nanorod arrays with a series of aspect ratios have been successfully fabricated in the pores of anodic aluminum oxide (AAO) membranes. The aspect ratio of Ni–P nanorods was controlled by the deposition time. The morphologies were analyzed by scanning electron microscopy and transmission electron microscopy. The dependence of the optical absorbance upon the aspect ratio was studied by UV–vis spectra. The results show that the absorbance increases in visible region and decreases rapidly in ultraviolet region as the aspect ratio of nanorods increases, which qualitatively agree with the prediction of Maxwell–Garnett (MG) theory and the simulation based on the Mie scattering theory, respectively. The dependence of photoluminescence emission (PL) spectra upon the aspect ratio is also obtained. These investigations show that the optical properties of nano-array composite structure can be modified by changing the aspect ratio of nanorods.

中文翻译：

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Ni-P/AAO纳米阵列复合结构的纵横比相关光学特性

使用电化学沉积，已成功地在阳极氧化铝 (AAO) 膜的孔中制造了具有一系列纵横比的 Ni-P 纳米棒阵列。Ni-P 纳米棒的纵横比由沉积时间控制。通过扫描电子显微镜和透射电子显微镜分析形态。通过紫外-可见光谱研究了吸光度对纵横比的依赖性。结果表明，随着纳米棒纵横比的增加，可见光区的吸光度增加，紫外区的吸光度迅速下降，这分别与麦克斯韦-加内特（MG）理论的预测和基于米氏散射理论的模拟一致。还获得了光致发光发射 (PL) 光谱对纵横比的依赖性。