基于氧化石墨烯/AgNPs/Cu 薄膜@金字塔 Si 杂化结构的高性能 SERS 基底。
High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si.
机构信息
School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
Shandong Provincial Key Laboratory of Biophysics, College of Physics and Electronic Information, Dezhou University, Dezhou 253023, PR China.
出版信息
Sci Rep. 2016 Dec 7;6:38539. doi: 10.1038/srep38539.
We present a novel surface-enhanced Raman scattering (SERS) substrate based on graphene oxide/silver nanoparticles/copper film covered silicon pyramid arrays (GO/AgNPs/PCu@Si) by a low-cost and simple method. The GO/AgNPs/PCu@Si substrate presents high sensitivity, good homogeneity and well stability with R6G molecules as a probe. The detected concentration of Rhodamine 6 G (R6G) is as low as 10 M. These sensitive SERS behaviors are also confirmed in theory via a commercial COMSOL software, the electric field enhancement is not only formed between the AgNPs, but also formed between the AgNPs and Cu film. And the GO/AgNPs/PCu@Si substrates also present good property on practical application for the detection of methylene blue (MB) and crystal violet (CV). This work may offer a novel and practical method to facilitate the SERS applications in areas of medicine, food safety and biotechnology.
我们提出了一种基于氧化石墨烯/银纳米粒子/铜膜覆盖硅金字塔阵列的新型表面增强拉曼散射（SERS）基底（GO/AgNPs/PCu@Si），该方法成本低且简单。GO/AgNPs/PCu@Si 基底具有高灵敏度、良好的均一性和稳定性，以 R6G 分子作为探针。检测到的 Rhodamine 6G（R6G）浓度低至 10M。这些敏感的 SERS 行为也通过商业 COMSOL 软件从理论上得到了证实，电场增强不仅在 AgNPs 之间形成，而且在 AgNPs 和 Cu 膜之间也形成。GO/AgNPs/PCu@Si 基底在亚甲基蓝（MB）和结晶紫（CV）的检测等实际应用中也表现出良好的性能。这项工作可能为促进 SERS 在医学、食品安全和生物技术领域的应用提供了一种新颖而实用的方法。
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