Synthesis of multi-branched gold nanostructures and their surface-enhanced Raman scattering properties of 4-aminothiophenol
Synthesis of multi-branched gold nanostructures and their surface-enhanced Raman scattering properties of 4-aminothiophenol
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多支化金纳米结构的合成及其4-氨基苯硫酚的表面增强拉曼散射性能
DOI：
10.1557/jmr.2018.503
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发表时间：
2019-09-16
影响因子：
2.7
通讯作者：
Yang, Jianhui
中科院分区：
文献类型：
--
作者：
He, Min;Cao, Beibei;Yang, Jianhui
开发了一种轻松的单罐和环保方法，用于通过在柠檬酸钠的存在下用过氧化氢（H2O2）降低氯酸盐金（HAUCL4），从而合成多支球状的花般的金（AU）纳米结构。多核Au纳米结构的特征是透射电子显微镜和紫外线可见（UV-VIS）吸收光谱。柠檬酸钠与Haucl4的摩尔比和反应试剂的浓度在形成多基团Au纳米结构中起着重要作用。带有锋利尖端的多重AU纳米结构表现出4-氨基硫醇（PATP）的出色表面增强拉曼散射（SERS）能力。实验和模拟的结果都证实，在SERS测量过程中，PATP转化向4,49-二芯氮唑苯转化的光诱导的催化偶联反应发生在高功率的多型Au纳米结构的表面上。据信，这些多养的Au纳米结构可能会在SER，生物传感器和光诱导的表面催化应用领域中找到潜在的应用。
A facile one-pot and environmentally friendly method was developed to synthesize multi-branched flowerlike gold (Au) nanostructures by reducing chlorate gold (HAuCl4) with hydrogen peroxide (H2O2) in the presence of sodium citrate. The multibranched Au nanostructures were characterized by transmission electron microscopy and Ultraviolet-visible (UV-vis) absorption spectroscopy. The molar ratio of sodium citrate to HAuCl4 and the concentrations of the reacted reagents play important roles in the formation of multibranched Au nanostructures. The multibranched Au nanostructures with sharp tips exhibit excellent surface-enhanced Raman scattering (SERS) ability of 4-aminothiophenol (PATP). The experimental and simulated results both confirm that the photoinduced catalytic coupling reaction of PATP transformation to 4,49-dimercaptoazobenzene occurs on the surface of multibranched Au nanostructures at a high power during the SERS measurement. It is believed that these multibranched Au nanostructures may find potential applications in SERS, biosensors, and the photoinduced surface catalytic application fields.