Department of Applied Chemistry, National Chiao Tung University, Hsinchu, 30010, Taiwan.
Department of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan.
Macromol Rapid Commun. 2020 Jun;41(11):e2000088. doi: 10.1002/marc.202000088. Epub 2020 Apr 24.
Surface properties are essential for substrates exhibiting high sensitivity in surface-enhanced Raman scattering (SERS) applications. In this work, novel SERS hybrid substrates using polystyrene-block-poly(methyl methacrylate) and anodic aluminum oxide templates is presented. The hybrid substrates not only possess hierarchical porous nanostructures but also exhibit superhydrophilic surface properties with the water contact angle ≈0°. Such surfaces play an important role in providing uniform enhanced intensities over large areas (relative standard deviation ≈10%); moreover, these substrates are found to be highly sensitive (limit of detection ≈10 m for rhodamine 6G (R6G)). The results show that the hybrid SERS substrates can achieve the simultaneous detection of multicomponent mixtures of different target molecules, such as R6G, crystal violet, and methylene blue. Furthermore, the bending experiments show that about 70% of the SERS intensities are maintained after bending from ≈30° to 150°.
表面性质对于在表面增强拉曼散射（SERS）应用中表现出高灵敏度的基底至关重要。在这项工作中，提出了一种使用聚苯乙烯-聚甲基丙烯酸甲酯和阳极氧化铝模板的新型 SERS 杂化基底。该杂化基底不仅具有分级多孔纳米结构，而且具有超亲水表面性质，水接触角≈0°。这样的表面在提供大面积均匀增强强度方面起着重要作用（相对标准偏差≈10%）；此外，这些基底被发现具有高灵敏度（对于罗丹明 6G（R6G）的检测限≈10m）。结果表明，杂化 SERS 基底可以实现不同目标分子的多组分混合物的同时检测，如 R6G、结晶紫和亚甲基蓝。此外，弯曲实验表明，从≈30°弯曲到 150°后，约 70%的 SERS 强度得以保持。
