Hu Bingxue, Sun Da-Wen, Pu Hongbin, Wei Qingyi
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; 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; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
Talanta. 2020 Oct 1;218:121188. doi: 10.1016/j.talanta.2020.121188. Epub 2020 May 21.
A universal surface-enhanced Raman scattering (SERS) substrate with tuneable plasmonic behaviour and long-term stability was synthesized and characterized, and the substrate was applied in the sensitive detection of fungicide malachite green (MG) in fish fillets. Temperature-responsive poly (N-isopropyl acrylamide) (pNIPAM) template and anisotropic Au nanorods (NRs) were synthesized to prepare pNIPAM @ Au NRs nano-hybrids with dynamically optical and SERS properties and high stability. Results showed that excitation wavelength-dependent SERS efficiency could be tailored by temperature-induced swelling and collapse of the nano-hybrids, thus anticipated optical and SERS properties of the composites could be obtained. Furthermore, the SERS performance, uniformity, long-term stability analysis, and MG in fish evaluation showed that the detection of MG in fish tissues was realized with a limit of detection of 1.58 × 10 M (0.73 ng/g), and the pNIPAM @ Au NRs composites could serve as effective SERS substrates allowing trace level detection of contaminants for the food industry.
合成并表征了一种具有可调谐等离子体行为和长期稳定性的通用表面增强拉曼散射（SERS）基底，并将该基底应用于鱼肉片中杀菌剂孔雀石绿（MG）的灵敏检测。合成了温度响应性聚（N-异丙基丙烯酰胺）（pNIPAM）模板和各向异性金纳米棒（NRs），以制备具有动态光学和SERS特性以及高稳定性的pNIPAM@Au NRs纳米杂化物。结果表明，通过温度诱导的纳米杂化物的溶胀和塌陷，可以调整激发波长依赖性SERS效率，从而获得复合材料预期的光学和SERS特性。此外，SERS性能、均匀性、长期稳定性分析以及鱼肉中MG的评估表明，实现了对鱼肉组织中MG的检测，检测限为1.58×10⁻⁸ M（0.73 ng/g），并且pNIPAM@Au NRs复合材料可以作为有效的SERS基底，用于食品工业中污染物的痕量检测。
