We report the controllable fabrication of Au nanostructures with different morphology inside the nanochannels of the Al-surrounded porous anodic aluminum oxide (AAO) templates. It has been found that the morphology of the Au nanostructures is influenced by the pore diameter of the AAO templates and the bottom Au layer sputtering on the surface of the AAO templates. Au nanowires are formed in the AAO templates with smaller pore diameters (40–60 nm), and rice spike-like Au nanostructures are formed in the AAO templates with larger pore diameters (∼130 nm). When the AAO templates with bottom Au layer were used, almost all of the nanochannels were filled with Au nanostructures. As the AAO templates without bottom Au layer were employed, longer Au nanostructures are formed inside some nanochannels near the Al-AAO boundary.

中文翻译：

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多孔阳极氧化铝模板中具有可控形貌的金纳米结构

我们报道了在铝包围的多孔阳极氧化铝（AAO）模板的纳米通道内可控地制造具有不同形态的金纳米结构。研究发现Au纳米结构的形貌受到AAO模板孔径和溅射在AAO模板表面的底部Au层的影响。在孔径较小（40-60 nm）的 AAO 模板中形成金纳米线，在孔径较大（~130 nm）的 AAO 模板中形成稻穗状金纳米结构。当使用具有底部金层的 AAO 模板时，几乎所有的纳米通道都填充有金纳米结构。由于采用没有底部 Au 层的 AAO 模板，在 Al-AAO 边界附近的一些纳米通道内形成了较长的 Au 纳米结构。