A high performance and highly-controllable core-shell imprinted sensor based on the surface-enhanced Raman scattering for detection of R6G in water.
A high performance and highly-controllable core-shell imprinted sensor based on the surface-enhanced Raman scattering for detection of R6G in water.
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DOI：
10.1016/j.jcis.2017.04.010
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发表时间：
2017-09
影响因子：
9.9
通讯作者：
Hongji Li;Jia-qi Jiang;Zirun Wang;Xiaonan Wang;Xiqing Liu;Yongsheng Yan;Chunxiang Li
中科院分区：
文献类型：
--
作者：
Hongji Li;Jia-qi Jiang;Zirun Wang;Xiaonan Wang;Xiqing Liu;Yongsheng Yan;Chunxiang Li
结合表面增强拉曼散射（SERS）和分子印迹技术制备了一种新型灵敏传感器材料。它以氨基功能化的SiO2纳米球为支撑材料，通过Ag+和NH2−之间的配位作用将Ag纳米粒子锚定在表面。然后以罗丹明6G（R6G）为模板，丙烯酰胺（AM）为功能单体，乙二醇二甲基丙烯酸酯（EGDMA）为交联剂，2,2'-偶氮二（2-甲基丙腈）（AIBN）为引发剂制备了核壳分子印迹聚合物。值得注意的是，壳厚度可以通过交联剂用量的调节来控制，并且发现当壳厚度约为 40 nm 时，SERS 检测信号最明显。在最佳条件下，拉曼信号（1505 cm−1）与模板浓度之间呈现良好的线性关系（R2= 0.93），检测限为10−12mol L−1。同时，选择性实验证明该材料对模板具有特异性选择性。证实核壳分子印迹聚合物是R6G检测领域中一种高灵敏度、高选择性的传感器材料。
A novel, sensitive sensor material combined the technique of surface enhance Raman scattering (SERS) and molecular imprinting was prepared. It was used the amino-functionalized SiO2nanospheres as the supporting materials and anchored Ag nanoparticles on the surface by the function of coordination between Ag+and NH2−. Then, it was used that the Rhodamine 6G (R6G) as the template, acrylamide (AM) as functional monomer, ethyleneglycol dimethacrylate (EGDMA) as cross-linker, 2,2′-azobis(2-methylpropionitrile) (AIBN) as initiator to prepare the core-shell molecular imprinted polymers. Prominently, the shell thickness could be controlled by the regulation of cross-linker dosage and it was found that the SERS detection signal was most obvious when the shell thickness was about 40 nm. Under the optimal condition, it was presented good linear relationship (R2= 0.93) between the Raman signal (at 1505 cm−1) and the concentration of the templates and the limit of detection was 10−12mol L−1. Meanwhile, the selective experiment was proved that this materials owned specific selectivity to the template. It was confirmed that the core-shell molecular imprinted polymers were a kind of highly sensitive and selective sensor materials in the field of R6G detection.