Comparison of surface-enhanced Raman scattering (SERS) effectiveness of Au nanoparticles/cicada wing substrates prepared by different methods
Comparison of surface-enhanced Raman scattering (SERS) effectiveness of Au nanoparticles/cicada wing substrates prepared by different methods
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DOI：
10.1016/j.ijleo.2017.08.130
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发表时间：
2017-01-01
期刊：
影响因子：
3.1
通讯作者：
Ma, Wanli
中科院分区：
文献类型：
--
作者：
Shi, Guochao;Zhu, Yanying;Ma, Wanli
分别采用化学还原浸渍法和磁控溅射技术合成了两种不同类型的金纳米粒子（Au）/蝉翼（CW）阵列。三维（3D）Au/CW-c（化学还原浸渍法制备）阵列和Au/CW-m（直流磁控溅射系统制备）基板作为SERS的活性基板。通过场发射扫描电子显微镜（FE-SEM）和拉曼系统对合成的 Au/CW-c 和 Au/CW-m 基底的形貌和拉曼信号进行了表征。合成的 Au/CW-c 和 Au/CW-m 基板的表征表现出出色的 SERS 性能。通过比较罗丹明6G（R6G）的增强拉曼信号，发现Au/CW-m底物比Au/CW-c底物更敏感。结果表明，Au/CW-m 底物对 R6G 的检测限 (LOD) 低至 10(-8) M。 Au/CW-c 基板的增强因子 (EF) 计算为 5.09 x 10(4)，Au/CW-m 基板的增强因子 (EF) 为 1.12 x 10(6)。这种现象是由于吸收电子的集体共振增强的高密度SERS热点有助于Au/CW-m基底的高SERS增强。我们的发现为快速、灵敏地检测痕量有机污染物提供了一种有前途的方法。 (C) 2017 爱思唯尔有限公司。版权所有。
Two different types of Au nanoparticles (Au)/cicada wing (CW) arrays were synthesized by chemical reduction impregnation method and magnetron sputtering technique, respectively. And three-dimensional (3D) Au/CW-c (prepared by chemical reduction impregnation method) arrays and Au/CW-m (prepared by DC magnetron sputtering system) substrate were used as active substrates for SERS. The morphologies and Raman signals of the synthesized Au/CW-c and Au/CW-m substrates were characterized by field emission scanning electron microscopy (FE-SEM) and Raman system. Characterizations of the synthesized Au/CW-c and Au/CW-m substrates exhibited outstanding SERS properties. By comparing the enhanced Raman signal of Rhodamine 6G (R6G), it was found that the Au/CW-m substrate was more sensitive than Au/CW-c substrate. The results showed that the limit of detection (LOD) for R6G was as low as 10(-8) M for the Au/CW-m substrate. The enhancement factors (EF) were calculated to be 5.09 x 10(4) for the Au/CW-c substrate and 1.12 x 10(6) for the Au/CW-m substrate. This phenomenon is due to the fact that the high-dense SERS hot spots where the collective resonance of the absorbed electrons enhances contribute to the high SERS enhancement of Au/CW-m substrate. What we have found provides a promising approach to the rapid and sensitive detection of trace of organic pollutants. (C) 2017 Elsevier GmbH. All rights reserved.