Electrodeposition of Ag Nanosheet-Assembled Film as Effective Surface-Enhanced Raman Scattering(SERS) Substrates
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摘要:
通过两步电化学沉积方法在氧化铟锡(ITO)玻璃基底上制备了大面积三维(3D)分级银(Ag)纳米片组装膜，研究了其表面增强拉曼散射效应(SERS)。 由于整个基底上 Ag 纳米片的边缘和纳米片交联间隙中存在大量 SERS“热点”，使用 3，3’-二乙基氧代二羰花青碘化物(DTTCI)作为探测分子，Ag 纳米片组装膜表现出强烈的 SERS 效应。 实验研究表明，由高密度堆积的纳米片组装的 Ag 薄膜表现出优异的 SERS 探测性能，可作为有效的低成本 SERS 基底用于物质的超灵敏检测。
Abstract:
Large-scale three-dimensional(3D)hierarchical Ag nanosheet-assembled films on the indium tin oxide(ITO)glass substrates were fabricated via two-step electrochemical deposition method, and its surface-enhanced Raman scattering effect(SERS)was studied. As a large number of hot spots were located at the edges of Ag nanosheets and the cross-linking gaps between the neighboring nanosheets across the whole substrate, using 3,3′-diethylthiatricarbocyanine iodide(DTTCI)as probing molecules, the Ag nanosheet-assembled film exhibited strong SERS effect. The SERS experiments showed that the Ag film assembled by nanosheets with high pack density exhibited excellent detecting performance, which could be used as effective low-cost SERS substrate for ultrasensitive detecting of substances.