二维自组装 Au-Ag 核壳纳米棒纳米阵列用于苹果中福美双的表面增强拉曼光谱法灵敏检测。
Two-dimensional self-assembled Au-Ag core-shell nanorods nanoarray for sensitive detection of thiram in apple using surface-enhanced Raman spectroscopy.
机构信息
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 Center, 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; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, 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; Food Refrigeration and Computerized Food Technology, University College Dublin, National University of Ireland, Agriculture and Food Science Centre, Belfield, Dublin 4, Ireland.
出版信息
Food Chem. 2021 May 1;343:128548. doi: 10.1016/j.foodchem.2020.128548. Epub 2020 Nov 6.
The development of substrate with high sensitivity and good reproducibility for surface-enhanced Raman scattering (SERS) detection of contaminants in foods has attracted more and more attention. Herein, a stable two-dimensional (2D) Au-Ag core-shell nanorods (Au@Ag NRs) nanoarray substrate with high-performance SERS activity was developed based on interface self-assembly strategy and successfully applied to the detection of thiram in apple sample. A broad linearity range of 0.01-10 mg/L and a low limit of detection of 0.018 mg/L were achieved for thiram solution. The substrate was stable and exhibited satisfactory sensitivity after preserving at ambient temperature for 4 weeks. Furthermore, this method presented the comparable result to that acquired from high-performance liquid chromatography (HPLC) with satisfactory recoveries of 93-116%. The study indicated that the prepared Au@Ag NRs nanoarray substrate was promising for SERS detection of contaminants such as pesticides in foods.
具有高灵敏度和良好重现性的基底对于表面增强拉曼散射（SERS）检测食品中的污染物的发展越来越受到关注。在此，基于界面自组装策略开发了一种具有高性能 SERS 活性的稳定二维（2D）Au-Ag 核壳纳米棒（Au@Ag NRs）纳米阵列基底，并成功应用于苹果样品中 thiram 的检测。对于 thiram 溶液，实现了 0.01-10mg/L 的宽线性范围和 0.018mg/L 的低检测限。该基底在室温下保存 4 周后仍然稳定，并且表现出令人满意的灵敏度。此外，该方法与高效液相色谱（HPLC）获得的结果相当，回收率为 93-116%。研究表明，所制备的 Au@Ag NRs 纳米阵列基底有望用于 SERS 检测食品中的污染物，如农药。
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