Fabrication of homogeneous waffle-like silver composite substrate for Raman determination of trace chloramphenicol,Microchimica Acta

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Fabrication of homogeneous waffle-like silver composite substrate for Raman determination of trace chloramphenicol
Microchimica Acta ( IF 5.3 ) Pub Date : 2020-10-07 , DOI: 10.1007/s00604-020-04567-2
Dongfang Xiao ₁ , Zhishun Jie ₁ , Zhiyuan Ma ₁ , Ye Ying ₁ , Xiaoyu Guo ₁ , Ying Wen ₁ , Haifeng Yang ₁

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Waffle-like anodized aluminum oxide homogeneously immobilized with Ag nanoparticles (AAO/Ag) is rationally designed and fabricated as surface-enhanced Raman scattering (SERS) substrate. The as-prepared SERS substrate is characterized with transmission electron microscope (TEM), scanning electron microscopy (SEM), UV–Vis spectrophotometer, and Fourier transform infrared spectrometer (FT-IR). The AAO/Ag substrate shows good uniformity of the Raman signals (RSD = 7.02%) due to waffle-like AAO supporting the well-dispersed Ag nanoparticles. For real application, the AAO/Ag substrate is used for rapid determination of chloramphenicol (CAP) in honey with low detection limit (4.0 × 10−9 mol L−1) and good linearity from 1.0 × 10−5 to 1.0 × 10−8 mol L−1 based on the SERS peak at 1348 cm−1. The better accumulation in the short pore path of AAO improves the target molecule approaching into the vicinity of hot spots of Ag nanoparticles. The high selectivity for CAP is attributed to the strong interaction between -NO2 group in CAP and the composite substrate. Schematic representation of the preparation of SERS substrate, AAO150/Ag10-5 composite nanoparticles, and antibiotic determination. Schematic representation of the preparation of SERS substrate, AAO150/Ag10-5 composite nanoparticles, and antibiotic determination.

中文翻译：

用于拉曼测定痕量氯霉素的均质华夫格状银复合基板的制备

均匀固定有银纳米粒子（AAO/Ag）的华夫格状阳极氧化铝被合理设计和制造为表面增强拉曼散射（SERS）衬底。使用透射电子显微镜 (TEM)、扫描电子显微镜 (SEM)、紫外-可见分光光度计和傅里叶变换红外光谱仪 (FT-IR) 对制备的 SERS 基板进行表征。由于华夫饼状 AAO 支持分散良好的 Ag 纳米粒子，AAO/Ag 基底显示出良好的拉曼信号均匀性 (RSD = 7.02%)。在实际应用中，AAO/Ag 底物用于快速测定蜂蜜中的氯霉素 (CAP)，检测限低 (4.0 × 10−9 mol L−1)，1.0 × 10−5 至 1.0 × 10− 线性良好8 mol L-1 基于 1348 cm-1 处的 SERS 峰。在 AAO 的短孔道中更好的积累改善了接近 Ag 纳米粒子热点附近的目标分子。CAP 的高选择性归因于 CAP 中的 -NO2 基团与复合基材之间的强相互作用。SERS基底的制备、AAO150/Ag10-5复合纳米颗粒的制备和抗生素测定的示意图。SERS基底的制备、AAO150/Ag10-5复合纳米颗粒的制备和抗生素测定的示意图。和抗生素测定。SERS基底的制备、AAO150/Ag10-5复合纳米颗粒的制备和抗生素测定的示意图。和抗生素测定。SERS基底的制备、AAO150/Ag10-5复合纳米颗粒的制备和抗生素测定的示意图。

更新日期：2020-10-07

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