A general method for large-scale fabrication of Cu nanoislands/dragonfly wing SERS flexible substrates
A general method for large-scale fabrication of Cu nanoislands/dragonfly wing SERS flexible substrates
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DOI：
10.1088/1674-1056/27/1/017801
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发表时间：
2018
影响因子：
1.7
通讯作者：
Yuhong 玉红 Wang 王;M. Wang 王;Lin 琳 Shen 沈;Yanying 艳英 Zhu 朱;X. Sun 孙;Guochao 国超 Shi 史;Xiaona 晓娜 Xu 许-Xiaona-晓
中科院分区：
文献类型：
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作者：
Yuhong 玉红 Wang 王;M. Wang 王;Lin 琳 Shen 沈;Yanying 艳英 Zhu 朱;X. Sun 孙;Guochao 国超 Shi 史;Xiaona 晓娜 Xu 许-Xiaona-晓
贵金属纳米粗糙表面具有很强的表面增强拉曼散射（Sers），在有机分子的实际检测中有着广泛的应用。采用磁控溅射的方法在自然沉积物上溅射廉价的铜，获得了一种低成本、大面积、环境友好的SERS活性基底。通过控制Cu在DW上制备的溅射时间，大大提高了Sers基底的性能。在最佳溅射时间（50 min）下获得的SERS活性基底显示出对4-氨基苯硫酚（4-ATP）的低检测限（10− 6 M）、高平均增强因子（EF，1.98×104）、优异的信号均匀性和良好的再现性。此外，三维时域有限差分（3D-FDTD）模拟的结果表明，SERS活性衬底提供了高密度的“热点”，导致大的Sers增强。
Noble metal nanorough surfaces that support strong surface-enhanced Raman scattering (SERS) is widely applied in the practical detection of organic molecules. A low-cost, large-area, and environment-friendly SERS-active substrate was acquired by sputtering inexpensive copper (Cu) on natural dragonfly wing (DW) with an easily controlled way of magnetron sputtering. By controlling the sputtering time of the fabrication of Cu on the DW, the performance of the SERS substrates was greatly improved. The SERS-active substrates, obtained at the optimal sputtering time (50 min), showed a low detection limit (10−6M) to 4-aminothiophenol (4-ATP), a high average enhancement factor (EF, 1.98×104), excellent signal uniformity, and good reproducibility. In addition, the results of the 3D finite-difference time-domain (3D-FDTD) simulation illustrated that the SERS-active substrates provided high-density “hot spots”, leading to a large SERS enhancement.