新型石墨烯/金纳米复合材料的表面增强拉曼散射传感特性
SERS Sensing Properties of New Graphene/Gold Nanocomposite.
作者信息
Neri Giulia, Fazio Enza, Mineo Placido Giuseppe, Scala Angela, Piperno Anna
机构信息
Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno D'Alcontres 31, I-98166 Messina, Italy.
Department of Mathematical and Computational Sciences, Physics and Earth Physics, University of Messina, Viale F. Stagno D'Alcontres 31, I-98166 Messina, Italy.
出版信息
Nanomaterials (Basel). 2019 Aug 30;9(9):1236. doi: 10.3390/nano9091236.
The development of graphene (G) substrates without damage on the sp network allows to tune the interactions with plasmonic noble metal surfaces to finally enhance surface enhanced Raman spectroscopy (SERS) effect. Here, we describe a new graphene/gold nanocomposite obtained by loading gold nanoparticles (Au NPs), produced by pulsed laser ablation in liquids (PLAL), on a new nitrogen-doped graphene platform (G-NH). The graphene platform was synthesized by direct delamination and chemical functionalization of graphite flakes with 4-methyl-2--nitrophenyl oxazolone, followed by reduction of -nitrophenyl groups. Finally, the G-NH/Au SERS platform was prepared by using the conventional aerography spraying technique. SERS properties of G-NH/Au were tested using Rhodamine 6G (Rh6G) and Dopamine (DA) as molecular probes. Raman features of Rh6G and DA are still detectable for concentration values down to 1 × 10 M and 1 × 10 M respectively.
在不破坏sp网络的情况下开发石墨烯（G）基底，能够调节与等离子体贵金属表面的相互作用，最终增强表面增强拉曼光谱（SERS）效应。在此，我们描述了一种新型的石墨烯/金纳米复合材料，它是通过将液体中脉冲激光烧蚀（PLAL）产生的金纳米颗粒（Au NPs）负载在新型氮掺杂石墨烯平台（G-NH）上而获得的。该石墨烯平台是通过用4-甲基-2-硝基苯基恶唑酮对石墨薄片进行直接分层和化学功能化，随后还原硝基苯基而合成的。最后，采用传统的气动喷涂技术制备了G-NH/Au SERS平台。以罗丹明6G（Rh6G）和多巴胺（DA）作为分子探针测试了G-NH/Au的SERS性能。对于浓度低至1×10⁻⁸ M和1×10⁻⁷ M的Rh6G和DA，其拉曼特征仍可检测到。
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