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首页> 外文期刊>RSC Advances >Au/Ag bimetal nanogap arrays with tunable morphologies for surface-enhanced Raman scattering
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Au/Ag bimetal nanogap arrays with tunable morphologies for surface-enhanced Raman scattering

机译：具有可调整形态的表面增强拉曼散射的Au / Ag双金属纳米间隙阵列

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摘要

When Au and Ag were deposited onto two-dimensional polystyrene (PS) templates, a curved bimetallic film composed of nanocap-shaped Au/Ag units was formed. The "Y"-shaped nanogaps and "V"-shaped junctions were tailored between the neighbour nanocaps by changing the bilayer thickness and PS diameters. Compared to the curved Ag, the curved Au monolayer and the flat Au/Ag bilayer on a silicon wafer, the curved Au/Ag bimetallic film exhibited significant SERS enhancement, which was mainly attributed to two important factors, the nanogaps between the adjacent Au/Ag nanocaps and the composite of the Ag/Au bimetallic film. And the nanogaps generated extremely intense local electromagnetic fields and the composite provided more possibilities for the residence of probing molecules.
机译：当将Au和Ag沉积到二维聚苯乙烯（PS）模板上时，形成了由纳米帽形Au / Ag单元组成的弯曲双金属膜。通过更改双层厚度和PS直径，可以在相邻的纳米帽之间定制“ Y”形纳米间隙和“ V”形结。与硅晶片上的弯曲Ag，弯曲的Au单层和平坦的Au / Ag双层相比，弯曲的Au / Ag双金属膜具有显着的SERS增强，这主要归因于两个重要因素，即相邻Au /之间的纳米间隙银纳米帽和银/金双金属膜的复合材料。纳米间隙会产生极强的局部电磁场，并且复合材料为探测分子的驻留提供了更多可能性。

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