Metallic plasmonic nanostructures have been widely investigated due to their unique optical controllability. In particular, the construction of large-area and uniform multi-metallic plasmonic nanoarrays with low cost has been a persistent pursuit. Herein, we proposed a simple method for the preparation of Au@Ag plasmonic arrays via polymer-nanoimprinting. Polycarbonate （PC） were reprinted with the pore structure of anodic aluminum oxide (AAO) template by hot melt embossed to form regular array of PC nanopillars. Then, a series of metallic plasmonic nanoarrays were obtained by depositing Au and Ag films with different thickness ratios on the top of the PC nanopillar. The uniform nanoarrays showed controllable near-field enhancing properties, and were employed as active surface-enhanced Raman Scattering (SERS) substrates, exhibiting good signal homogeneity (RSD ≈ 3.33%) for crystal violet (CV) molecules. This paper provides a simple, low-cost, and popularizing method for the preparation of SERS substrate with stable performance, having a good application prospect.

金属等离子体纳米结构由于其独特的光学可控性而被广泛研究。特别是构建大面积、均匀、低成本的多金属等离子体纳米阵列一直是人们不懈的追求。在此，我们提出了一种通过聚合物纳米压印制备 Au@Ag 等离子体阵列的简单方法。聚碳酸酯（PC）采用阳极氧化铝（AAO）模板的孔结构，通过热熔压印工艺重印，形成规则阵列的PC纳米柱。然后，通过在 PC 纳米柱的顶部沉积具有不同厚度比的 Au 和 Ag 薄膜，获得了一系列金属等离子体纳米阵列。均匀的纳米阵列表现出可控的近场增强特性，并被用作活性表面增强拉曼散射（SERS）衬底，对结晶紫 (CV) 分子表现出良好的信号均匀性 (RSD ≈ 3.33%)。本文为制备性能稳定的SERS基底提供了一种简单、低成本、推广的方法，具有良好的应用前景。