Hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for surface-enhanced Raman scattering substrates
Hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for surface-enhanced Raman scattering substrates
复制标题
用银纳米颗粒装饰的六边形排列的海胆状银半球阵列，用于表面增强拉曼散射基底
DOI：
10.1007/s12274-015-0737-7
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发表时间：
2015-07-01
期刊：
影响因子：
9.9
通讯作者：
Li, Fadi
中科院分区：
文献类型：
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作者：
Tang, Haibin;Meng, Guowen;Li, Fadi
贵金属颗粒的表面形貌是调节表面增强拉曼散射 (SERS) 特性的重要因素。在这里，我们提出了一种简单的制造路线，以六边形排列的表面粗糙的海胆状银半球（Ag-HS）阵列装饰银纳米颗粒（Ag-NP），以获得高活性和可重复的SERS基底。海胆状的 Ag-HS 阵列是通过将 Ag 溅射到高度有序的多孔阳极氧化铝 (AAO) 模板的顶表面上以形成光滑 Ag-HS 的有序阵列，然后将 Ag-NP 电沉积到每个 Ag-HS 的表面上来实现的。由于Ag-HS的有序排列和改善的表面粗糙度，海胆状分层Ag-HS阵列可以为可重复且高活性的SERS效应提供足够且均匀的“热点”。使用类似海胆的 Ag-HS 阵列作为 SERS 底物，鉴定出 10−7M 邻苯二甲酸二丁酯（增塑剂家族的成员）和 1.5 × 10−5M PCB-77（多氯联苯的同系物，一类臭名昭著的污染物），显示出这些底物在快速识别有机污染物方面的巨大潜力。
The surface topography of noble metal particles is a significant factor in tailoring surface-enhanced Raman scattering (SERS) properties. Here, we present a simple fabrication route to hexagonally arranged arrays of surface-roughened urchinlike Ag hemispheres (Ag-HSs) decorated with Ag nanoparticles (Ag-NPs) for highly active and reproducible SERS substrates. The urchin-like Ag-HS arrays are achieved by sputtering Ag onto the top surface of a highly ordered porous anodic aluminum oxide (AAO) template to form ordered arrays of smooth Ag-HSs and then by electrodepositing Ag-NPs onto the surface of each Ag-HS. Owing to the ordered arrangement of the Ag-HSs and the improved surface roughness, the urchin-like hierarchical Ag-HS arrays can provide sufficient and uniform “hot spots” for reproducible and highly active SERS effects. Using the urchin-like Ag-HS arrays as SERS substrates, 10−7M dibutyl phthalate (a member of plasticizers family) and 1.5 × 10−5M PCB-77 (one congener of polychlorinated biphenyl, a notorious class of pollutants) are identified, showing promising potential for these substrates in the rapid recognition of organic pollutants.