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Growth and properties of gold and nickel nanorods in thin film alumina

机译：薄膜氧化铝中金和镍纳米棒的生长及其性能

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摘要

Arrays of nickel and gold nanorods have been grown on glass and silicon substrates using porous alumina templates of less than 500 nm thickness. A method is demonstrated for varying the diameter of the nanorods whilst keeping the spacing constant. Optical extinction spectra for the gold nanorods show two distinct maxima associated with the transverse and longitudinal axes of the rods. Adding small quantities of oxygen to the aluminium before anodization is found to improve the sharpness of the extinction peaks. The spectral position of the longitudinal peak is shown to be sensitive to the nanorod diameter for constant length and spacing. For the nickel nanorods it is shown that the magnetic properties are governed by both interactions between the wires and shape anisotropy.
机译：镍和金纳米棒的阵列已使用厚度小于500 nm的多孔氧化铝模板在玻璃和硅基板上生长。展示了一种在保持间距不变的情况下改变纳米棒直径的方法。金纳米棒的消光光谱显示出与棒的横轴和纵轴相关的两个不同的最大值。发现在阳极氧化之前向铝中添加少量的氧气可以改善消光峰的清晰度。对于恒定的长度和间隔，纵向峰的光谱位置显示为对纳米棒直径敏感。对于镍纳米棒，表明磁性由线之间的相互作用和形状各向异性共同决定。

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