Highly ordered Au-decorated Ag nanorod arrays as an ultrasensitive and reusable substrate for surface enhanced Raman scattering
Highly ordered Au-decorated Ag nanorod arrays as an ultrasensitive and reusable substrate for surface enhanced Raman scattering
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高度有序的金装饰银纳米棒阵列作为超灵敏且可重复使用的基底，用于表面增强拉曼散射
DOI：
10.1016/j.colsurfa.2018.10.040
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发表时间：
2019-01
期刊：
影响因子：
--
通讯作者：
Wang Jun
中科院分区：
文献类型：
--
作者：
Dan Yaqian;Zhong Chengquan;Zhu Huanwen;Wang Jun
对于表面增强拉曼光谱（Sers）基底，制造工艺的复杂性、灵敏度和稳定性是需要考虑的因素。我们报道了一种简单而新颖的方法来制备一种有效的基底，大大增强Sers信号。通过在高度有序的多孔阳极氧化铝（AAO）模板中选择性化学沉积Ag纳米颗粒，然后对其进行刻蚀，形成Ag纳米棒束结构，从而在纳米棒与纳米棒束顶部的差距处产生了拉曼增强，并通过有限元分析进行了验证。该方法的一个特点是首次利用其合成了Ag纳米棒阵列结构，结果表明，该方法制备的基底具有特殊的微纳结构，当选择罗丹明6G作为检测试剂时，检测限低至10−16M，且具有良好的可回收性。这种优异的阵列结构在表面Sers领域具有很好的实际应用前景。
For surface-enhanced Raman spectroscopy (SERS) substrates, complexity of the fabrication process, sensitivity and stability are factors that need to be considered. We report a simple and novel method for preparing an effective substrate that greatly enhances SERS signals. The SERS substrate is fabricated by selectively electroless deposition of Ag nanoparticles in the highly ordered porous anodized aluminum oxide (AAO) template and then etching it to form Ag nanorod bundles structure, so that the Raman enhancement occurs in the gap between the nanorods and the top of the nanorod bundle, which is verified by finite element analysis. A peculiarity of this method is that this is the first time to synthesize Ag nanorod arrays structure by using it. The results indicated that this prepared substrate has special micro-nano structure and when rhodamine 6 G is selected as the detection reagent, the detection limit is as low as 10−16M with excellent recyclability. This outstanding array structure has a promising practical application in SERS field.
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