AbstractAn efficient approach is demonstrated for preparing particles consisting of a silver core and a shell of molecularly imprinted polymer (Ag@MIP). The MIP is prepared by using bisphenol A (BPA) as the template and 4-vinylpyridine as the functional monomer. The Ag@MIP fulfills a dual function in that the silver core acts as a SERS substrate, while the MIP allows for selective recognition of BPA. The Ag@MIP is characterized by scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, thermogravimetric analysis and Raman spectroscopy. The Raman intensity of Ag@MIP is higher than that of bare silver microspheres. The detection limit for BPA is as low as 10−9 mol·L−1. Graphical abstractSchematic illustration of the preparation of silver microspheres coated with a molecularly imprinted polymer (Ag@MIPs) for detecting bisphenol A (BPA) by surface enhanced Raman scattering (SERS).

中文翻译：

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涂有分子印迹聚合物的银微球作为 SERS 底物，用于灵敏检测双酚 A

摘要展示了一种制备由银核和分子印迹聚合物（Ag@MIP）壳组成的粒子的有效方法。MIP是以双酚A（BPA）为模板，4-乙烯基吡啶为功能单体制备的。Ag@MIP 具有双重功能，即银核充当 SERS 底物，而 MIP 允许选择性识别 BPA。Ag@MIP 的特征在于扫描电子显微镜、透射电子显微镜、X 射线粉末衍射、热重分析和拉曼光谱。Ag@MIP 的拉曼强度高于裸银微球的拉曼强度。BPA 的检测限低至 10-9 mol·L-1。