Highly ordered dimple arrays that give rise to bright structural colours with a rainbow distribution have been fabricated by means of etidronic acid anodising and subsequent selective oxide dissolution. High-purity aluminium samples were anodised at 270 V and 313 K and after removing the alumina porous film, highly ordered structures were obtained with two different cell diameters, namely 701 ± 43 and 655 ± 36 nm. These highly ordered near-subwavelength structures fabricated on the aluminium surface induced an optical effect for surface colorisation that could be predicted by interferometric equations. The generated angle-dependent colours were investigated. The mathematically predicted colours agree well with the reflected measured colours.

中文翻译：

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阳极氧化铝衍射光栅产生的干涉色

通过依替膦酸阳极氧化和随后的选择性氧化物溶解，已经制造出高度有序的凹坑阵列，这些阵列产生具有彩虹分布的明亮结构颜色。高纯铝样品在 270 V 和 313 K 下进行阳极氧化，去除氧化铝多孔膜后，获得高度有序的结构，具有两种不同的细胞直径，即 701 ± 43 和 655 ± 36 nm。这些在铝表面上制造的高度有序的近亚波长结构引起了表面着色的光学效应，可以通过干涉方程预测。研究了生成的角度相关颜色。数学预测的颜色与反射的测量颜色非常吻合。