High-adhesive superhydrophobic 3D nanostructured silver films applied as sensitive, long-lived, reproducible and recyclable SERS substrates.
High-adhesive superhydrophobic 3D nanostructured silver films applied as sensitive, long-lived, reproducible and recyclable SERS substrates.
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DOI：
10.1039/c4nr02198c
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发表时间：
2014-07
期刊：
影响因子：
6.7
通讯作者：
Yunwen Wu;T. Hang;J. Komadina;Huiqin Ling;Ming Li
中科院分区：
文献类型：
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作者：
Yunwen Wu;T. Hang;J. Komadina;Huiqin Ling;Ming Li
通过控制镀液成分，化学沉积了不同形貌的银膜。结果表明，表面的润湿性和表面增强拉曼散射（Sers）特性与表面形貌密切相关。三维微球/纳米片（MN）银膜由于其完美的三维形貌和均匀分布的三种纳米间隙对三维电磁场的增强作用，表现出比二维纳米片（NS）和纳米颗粒（NP）更好的Sers性能。MN银膜在没有任何功能化的氧化过程后显示出高粘附性的超疏水特性。它可以在相当小的体积内容纳液滴并追踪目标分子。由于超疏水性的聚集效应，氧化后的MN基底的Sers性能比新鲜制备的基底有显著的提高。所制备的3D MN银基底在重复性和重复利用方面也表现出良好的性能，使其成为一种有前途的分子示踪基底。
Silver films with different morphologies were chemically deposited by controlling the bath composition. It is found that the wettability and surface enhanced Raman scattering (SERS) properties were closely connected with the surface morphology. Due to the perfect 3D morphology and the 3D electromagnetic field enhanced by three types of nanogaps distributed uniformly, the 3D microball/nanosheet (MN) silver film shows better SERS properties than those of 2D nanosheets (NSs) and nanoparticles (NPs). The MN silver film showed high adhesive superhydrophobic properties after an oxidation process without any functionalization. It can hold the liquid droplet and trace the target molecules in a rather small volume. The SERS properties of the oxidized MN substrate were enhanced remarkably compared to those of the freshly prepared substrate because of the concentrating effect of the superhydrophobicity. The as-prepared 3D MN silver substrate has also exhibited good performances in reproducibility and reutilization which makes it a promising substrate for molecule tracing.