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Plasmonic resonances in hybrid systems of aluminum nanostructured arrays and few layer graphene within the UV-IR spectral range

机译：铝纳米结构阵列混合系统中的等离子体共振，UV-IR光谱范围内的少数层石墨烯

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The size-controllable and ordered Al nanocavities and nanodomes arrays were synthesized by electrochemical anodization of aluminum using phosphoric acid, citric acid and mixture both acids. Few layer graphene (FLG) was transferred directly on top of Al nanostructures and their morphology were evaluated by scanning electron microscopy. The interaction between FLG and the plasmonic properties of Al nanostructures arrays were investigated based on specular reflectivity in the ultraviolet-visible-infrared range and Raman spectroscopy. We found that their optical reflectivity was dramatically reduced as compared with unstructured Al. At the same time pronounced reflectivity dips were detectable in the 200-896 nm wavelength range, which were ascribed to plasmonic resonances. The plasmonic properties of these nanostructures do not exhibit evident changes by the presence of FLG in the UV-vis range of the electromagnetic spectrum. By contrast, the surface-enhanced Raman spectroscopy of FLG was observed in nanocavities and nanodomes structures that result in an intensity increase of the characteristic G and 2D bands of FLG induced by the plasmonic properties of Al nanostructures.
机译：通过使用磷酸，柠檬酸和混合物两种酸通过铝的电化学阳极氧化来合成尺寸可控和有序的Al纳米覆盖和纳米摩擦阵列。将几层石墨​​烯（FLG）直接转移到Al纳米结构的顶部，通过扫描电子显微镜评估它们的形态。基于紫外 - 可见红外范围和拉曼光谱法，研究了FLG与Al纳米结构阵列的等离子体特性的相互作用。我们发现，与非结构化Al相比，它们的光学反射率显着降低。同时在200-896nm波长范围内可检测到明显的反射率倾向，其归因于等离子体共振。这些纳米结构的等离子体性能通过在电磁光谱的UV-VIS范围内的FLG存在下表现出明显的变化。相比之下，在纳米宽度和纳米米结构中观察到FLG的表面增强拉曼光谱，其导致由Al纳米结构等离子体性能诱导的FLG的特征G和2D带的强度增加。

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