Rapid detection of hexamethylenetetramine based on the substrate UC@SiO<sub>2</sub>@Au@Ag using SERS

Rui Tong; Xiaopeng Hu; Guozhen Fang; Shiming Sun; Jingmin Liu; Shuo Wang

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Rapid detection of hexamethylenetetramine based on the substrate UC@SiO₂@Au@Ag using SERS

机译：基于SERS的底物UC @ SiO _{2 @ Au @ Ag快速检测六亚甲基四胺}

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A reliable upconversion (UC) material assembled from Au@Ag (UC@SiO₂@Au@Ag), as the substrate, was firstly employed to detect hexamethylenetetramine (HMT) in bean vermicelli by surface enhanced Raman spectroscopy (SERS). In this substrate, UC can convert near-infrared (NIR) light into visible light to promote localized surface plasmon resonance (LSPR) of noble metal nanoparticles to enhance the SERS signal. According to optimized synthesis conditions, the SERS substrate was obtained and evaluated. The substrate shows uniformity with RSD of 7.05% and 7.37% for the Raman vibrations at ～780 cm?1 and ～1043 cm?1 respectively, and sensitivity with detection limits of 1 mg L?1 for HMT. Based on the better sensitivity of this method, the artificially positive samples have been detected.

机译：首先采用以Au @ Ag（UC @ SiO _{2 @ Au @ Ag）为底物组装的可靠的上转换（UC）材料检测六亚甲基四胺（HMT）表面增强拉曼光谱法（SERS）测定豆粉中的含量。在此基板中，UC可以将近红外（NIR）光转换为可见光，以促进贵金属纳米颗粒的局部表面等离子体共振（LSPR），从而增强SERS信号。根据优化的合成条件，获得并评估了SERS底物。基板在〜780 cm ？1 和〜1043 cm ？1 处的拉曼振动的均匀性分别为7.05％和7.37％。对于HMT的灵敏度分别为1 mg L ？1 。基于这种方法的更高灵敏度，已经检测到了人工阳性样品。}

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《RSC Advances》 |2017年第79期|共6页
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Rui Tong; Xiaopeng Hu; Guozhen Fang; Shiming Sun; Jingmin Liu; Shuo Wang;
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Rapid detection of hexamethylenetetramine based on the substrate UC@SiO2@Au@Ag using SERS

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Rapid detection of hexamethylenetetramine based on the substrate UC@SiO₂@Au@Ag using SERS