School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.
School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jun 5;294:122548. doi: 10.1016/j.saa.2023.122548. Epub 2023 Feb 24.
Surface-enhanced Raman spectroscopy (SERS) technology has been revived and developed with the introduction of metal-organic frameworks (MOFs), while more valuable properties of MOFs for SERS substrates remain largely unexplored. This work constructed a new SERS substrate FeO@UiO-66(Zr)@Ag nanoparticles (FUAs) with excellent SERS detection sensitivity, uniformity, reproducibility and stability, exhibiting a high Raman enhancement factor (5.62 × 10), low limit of detection (LOD, 2.11 × 10 M) and RSD (12.41 %) for 4-NBT, and maintaining 81 % SERS activity within 60 days. The FUAs took full advantage of the strong affinity of UiO-66(Zr) for organophosphorus pesticides (OPs) to realize trace OPs detection. The LODs of phoxim, triazophos and methyl parathion in apple juice were 0.041, 0.021 and 0.0031 mg/L, respectively, with good linearities ranging from 0.02 or 0.1-50 mg/L, meeting the requirements of the food control standards, indicating that the potentials and prospects of the FUAs SERS substrate for trace detecting OPs in foods.
表面增强拉曼光谱（SERS）技术随着金属有机骨架（MOFs）的引入而复兴和发展，而 MOFs 作为 SERS 基底更有价值的特性在很大程度上仍未得到探索。本工作构建了一种新的 SERS 基底 FeO@UiO-66(Zr)@Ag 纳米粒子（FUAs），具有优异的 SERS 检测灵敏度、均匀性、重现性和稳定性，表现出高拉曼增强因子（5.62×10）、低检测限（LOD，2.11×10 M）和 4-NBT 的相对标准偏差（RSD，12.41%），在 60 天内保持 81%的 SERS 活性。FUAs 充分利用了 UiO-66(Zr) 对有机磷农药（OPs）的强亲和力，实现了痕量 OPs 的检测。在苹果汁中，对辛硫磷、三唑磷和甲基对硫磷的检测限分别为 0.041、0.021 和 0.0031 mg/L，线性范围从 0.02 或 0.1-50 mg/L，符合食品控制标准，表明 FUAs SERS 基底在食品中痕量检测 OPs 的潜力和前景。
