Abstract A simple and cost-effective approach has been exploited for the synthesis of large-area urchin-like Au nanospheres (Au-NSs) micro-nano arrays in anodic aluminum oxide (AAO) template. By sputtering Au on the surface of highly ordered Fe nanorods arrays, Au nanoparticles (Au-NPs) could self-assembly to form urchin-like micro-nano arrays. The urchin-like micro-nano arrays exhibit strong surface-enhanced Raman scattering (SERS) activity for detecting rhodamine 6G (R6G) because of its regular arrangement and rough surface. According to the analysis of three-dimensional finite-difference-time-domain (FDTD) simulations (Lumerical FDTD Solution, Inc., Canada), the strong SERS activity is mainly due to the high density of hot spots induced by the gaps between the neighboring Au-NSs. The Urchin-like arrays exhibit promising potential as new platforms to realize novel optoelectronic devices.

中文翻译：

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自组装类 Urchin 的 Au-NSs 阵列及其作为表面增强拉曼散射衬底的应用

摘要 一种简单且具有成本效益的方法已被用于在阳极氧化铝 (AAO) 模板中合成大面积海胆状金纳米球 (Au-NSs) 微纳米阵列。通过在高度有序的 Fe 纳米棒阵列表面溅射 Au，Au 纳米颗粒 (Au-NPs) 可以自组装形成类似海胆的微纳米阵列。类似海胆的微纳米阵列由于排列规则和表面粗糙，在检测罗丹明 6G (R6G) 时表现出很强的表面增强拉曼散射 (SERS) 活性。根据三维有限差分时域（FDTD）模拟（Lumerical FDTD Solution, Inc., Canada）的分析，强烈的 SERS 活动主要是由于相邻的 Au-NS。