Xiu Wenli, Zhao Peini, Pan Yujie, Wang Xiaoru, Zhang Lina, Ge Shenguang, Yu Jinghua
School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
Anal Chim Acta. 2023 May 1;1253:341097. doi: 10.1016/j.aca.2023.341097. Epub 2023 Mar 14.
A surface-enhanced Raman scattering (SERS) sensor based on the folding and assembly characteristics of the three-dimensional structure of paper fibers, the skeleton controllability of metal-organic framework materials (MOFs), and the morphology designability of plasmonic noble metal materials has been established for rapid on-site determination of ethephon in food. HKUST-1(Cu) was assembled onto a carbon-treated chromatographic paper matrix by electrodeposition, and its skeleton respiration and sponge effect were used to overcome the bottleneck problem of poor affinity of SERS substrate for target molecules. Further coupled with the targeted recognition specificity of biomimetic antibodies, a paper-based interface with high specificity of molecular sensitivity was constructed. A sandwich multi-stage progressive enhancement structure was designed to couple plasma pine branch-shaped silver material in situ at the interface to realize superposition and collaborative amplification of SERS signals. When the paper-based strip sensor was used to monitor ethephon, it demonstrated a linear range of 10 to 10 mg kg and a detection limit of around 1.39 × 10 mg kg. The construction and application of the paper-based HKUST-1(Cu)/biomimetic antibodies/pine branch-shaped silver material sensor will provide technical means and theoretical support for the rapid and efficient identification of biological ripening agent residues in food with multi-level signal enhancement.
基于纸纤维三维结构的折叠与组装特性、金属有机框架材料（MOF）的骨架可控性以及等离子体贵金属材料的形貌可设计性，构建了一种用于食品中乙烯利快速现场测定的表面增强拉曼散射（SERS）传感器。通过电沉积将HKUST-1（Cu）组装到经碳处理的色谱纸基质上，并利用其骨架呼吸和海绵效应克服了SERS基底对目标分子亲和力差的瓶颈问题。进一步结合仿生抗体的靶向识别特异性，构建了具有高分子敏感性特异性的纸基界面。设计了一种三明治式多级递进增强结构，在界面处原位耦合等离子体松枝状银材料，实现SERS信号的叠加和协同放大。当使用纸基条形传感器监测乙烯利时，其线性范围为10至10 mg kg，检测限约为1.39×10 mg kg。基于纸的HKUST-1（Cu）/仿生抗体/松枝状银材料传感器的构建与应用，将为通过多级信号增强快速高效识别食品中生物催熟剂残留提供技术手段和理论支持。
