用于表面增强拉曼光谱（SERS）的纳米重复正和倒置亚微米聚合物金字塔阵列
Nanoreplicated positive and inverted sub-micron polymer pyramids array for surface enhanced Raman spectroscopy (SERS)
摘要：
我们展示了镀金聚合物表面增强拉曼散射（SERS）衬底与一对互补的结构-正，倒金字塔阵列结构制造的多步成型和复制过程。以罗丹明6 G为目标分析物，正棱锥基底在整个器件表面上的均匀SERS增强因子为7.2 × 10^4，而倒棱锥基底为1.6 × 10^6。基于光反射测量和FDTD模拟结果，增强因子的差异归因于等离子体共振匹配和SERS“热点”。通过这种简单、快速和多功能的互补成型工艺，我们可以以极低的成本、高产量和高重复性生产聚合物SERS基底。
英文摘要：
We demonstrate gold coated polymer surface enhanced Raman scattering (SERS) substrates with a pair of complementary structures--positive and inverted pyramids array structures fabricated by multiple-step molding and replication process. The uniform SERS enhancement factors over the entire device surfaces were measured as 7.2 X 10^4 for positive pyramids substrate while 1.6 X 10^6 for inverted pyramids substrate with Rhodamine 6G as the target analyte. Based on the optical reflection measurement and FDTD simulation result, the enhancement factor difference is attributed to plasmon resonance matching and to SERS "hot spots ". With this simple, fast and versatile complementary molding process, we can produce polymer SERS substrates with extremely low cost, high throughput and high repeatability.
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