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首页> 外文期刊>RSC Advances >Controllable fabrication of Ag-nanoplate-decorated PAN-nanopillar arrays and their application in surface-enhanced Raman scattering
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Controllable fabrication of Ag-nanoplate-decorated PAN-nanopillar arrays and their application in surface-enhanced Raman scattering

机译：Ag纳米板修饰PAN纳米柱阵列的可控制备及其在表面增强拉曼散射中的应用

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We report a facile and low-cost approach for fabrication of large-scale surface-enhanced Raman scattering (SERS) active substrates composed of Ag-nanoplates (Ag-NPs) decorated polyacrylonitrile nanopillar (denoted as Ag-NPs@PAN-nanopillar) arrays, via a consecutive process of molding PAN-nanopillar arrays, sputtering Au-nanoparticles onto the PAN-nanopillar arrays as a conducting layer, and decorating the PAN-nanopillars with Ag-nanoplates. The Ag-nanoplate distribution density on the PAN-nanopillars can be tailored by tuning the concentration of citric acid and the Ag-deposition duration, and high SERS sensitivity can thus be achieved by optimizing the density of Ag-nanoplates. The adjacent Ag-nanoplates induced “hot spots” are densely and uniformly distributed in the three dimensional (3D) space around the PAN-nanopillar arrays, and thus Ag-NPs@PAN-nanopillar arrays generated sensitive and homogenous SERS signals when using rhodamine 6G as a probed molecule. Using the Ag-NPs@PAN-nanopillar arrays as SERS substrates, 10?7 M methyl parathion (organophosphorus insecticide) and 10?6 M PCB-77 (one congener of polychlorinated biphenyls belonging to persistent organic pollutants) are identified. Therefore the SERS-active substrates have potential in SERS-based rapid detection of environmental organic pollutants.
机译：我们报告了一种由Ag-纳米板（Ag-NPs）装饰的聚丙烯腈纳米柱（表示为Ag-NPs @ PAN-nanopillar）阵列组成的大规模表面增强拉曼散射（SERS）有源基板的制造的便捷且低成本的方法。 ，依次通过模制PAN纳米柱阵列，将金纳米粒子溅射到PAN纳米柱阵列上作为导电层，以及用Ag纳米板装饰PAN纳米柱的连续过程。可以通过调节柠檬酸的浓度和Ag的沉积持续时间来调整PAN纳米柱上的Ag纳米板分布密度，从而可以通过优化Ag纳米板的密度来实现高SERS灵敏度。相邻的银纳米板诱发的“热点”密集且均匀地分布在PAN纳米柱阵列周围的三维（3D）空间中，因此当使用罗丹明6G时，Ag-NPs @ PAN纳米柱阵列会生成敏感且均匀的SERS信号。作为被探测的分子。使用Ag-NPs @ PAN-nanopillar阵列作为SERS底物，10 ？7 M甲基对硫磷（有机磷杀虫剂）和10 ？6 sup> M PCB-77（属于持久性有机污染物的多氯联苯的同类物）已被鉴定。因此，SERS活性底物在基于SERS的环境有机污染物快速检测中具有潜力。

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