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首页> 外文期刊>Nanotechnology >Robust, reproducible, recyclable SERS substrates: monolayers of gold nanostars grafted on glass and coated with a thin silica layer
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Robust, reproducible, recyclable SERS substrates: monolayers of gold nanostars grafted on glass and coated with a thin silica layer

机译：鲁棒，可重复的，可回收的SERS基材：嫁接在玻璃上并涂有薄二氧化硅层的金纳米键的单层

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摘要

We prepared and characterized recyclable surface enhanced Raman spectroscopy (SERS) active glass chips. Gold nanostars were grafted on properly functionalized glasses by means of electrostatic interactions and then they were coated with a silica layer of controllable thickness in the nanometer range. The SERS activity of the obtained substrates were tested in terms of reproducibility and homogeneity intra-samples and inter-samples from different batches using the Raman reporter as the model compound rhodamine 6G. The uncoated substrates were used as reference to evaluate the effect of silica spacers on SERS enhancement factors (EFs). The chemical route to obtain silica-coated SERS chips is described in detail, and the morphology and the optical response of substrates have been characterized. We demonstrate that SERS substrates coated with 1 nm silica conserve a good EF, and that the coating confers to the SERS platform an extreme robustness leading to reusability of the substrates.
机译：我们准备和表征可回收表面增强拉曼光谱（SERS）活性玻璃芯片。 通过静电相互作用在适当的官能化玻璃上嫁接金纳略，然后用纳米范围的可控厚度的二氧化硅层涂覆。 通过使用拉曼报告称，在样品中，使用拉曼报告称为模型化合物罗丹明6g，在样品中的再现性和均匀性分析和样品中的样品中的样品中的样品。 未涂覆的底物作为参考，评价二氧化硅间隔物对SERs增强因子（EFS）的影响。 详细描述了获得二氧化硅涂覆的SER芯片的化学途径，并且表征了基材的形态和光学响应。 我们证明涂有1nm二氧化硅的SERS基材节省了良好的EF，并且涂层赋予SERS平台的极端鲁棒性，导致基板的可重用性。

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