Ag nanocubes monolayer-modified PDMS as flexible SERS substrates for pesticides sensing
Ag nanocubes monolayer-modified PDMS as flexible SERS substrates for pesticides sensing
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DOI：
10.1007/s00604-022-05328-z
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发表时间：
2022-05
影响因子：
5.7
通讯作者：
D. Xia;Panpan Jiang;Zhiwei Cai;Rui Zhou;Bo Tu;Nan Gao;G. Chang;Hanping He;Yunbin He
中科院分区：
文献类型：
--
作者：
D. Xia;Panpan Jiang;Zhiwei Cai;Rui Zhou;Bo Tu;Nan Gao;G. Chang;Hanping He;Yunbin He
提出了一种利用三相界面自组装技术制备柔性银纳米立方体/聚二甲基硅氧烷（Ag NCs/PDMS）表面增强拉曼散射（Sers）基底的新方法。用扫描电镜和X射线衍射对产物的形貌和晶体结构进行了表征。该自组装Ag NCs/PDMS基底具有较高的Sers活性和良好的信号均匀性，成功用于福美双的定量检测，检测限达到10 ng/mL，线性范围为10-1000 ng/mL。将该Sers成功地应用于实际苹果样品中福美双残留的检测，在苹果果皮中检测到了痕量（1 ng/cm 2）的福美双残留。自组装Ag NCs/PDMS基底优异的Sers光谱检测能力预示着其在未来农药检测中将发挥重要作用。
A new approach is presented to fabricate flexible surface-enhanced Raman scattering (SERS) substrate of Ag nanocubes monolayer-modified polydimethylsiloxane (Ag NCs/PDMS) through a powerful three-phase interface self-assemble method. The morphologies and crystal structures were characterized by scanning electron microscopy and X-ray diffraction. The self-assembled Ag NCs/PDMS substrate exhibited high SERS activity and good signal homogeneity, which was successfully used for quantitative detection of thiram; the detection limit reached 10 ng/mL, and the linear range is 10–1000 ng/mL. Furthermore, the flexible SERS substrates were successfully employed to detect thiram residues on factual apple samples, and trace amount (1 ng/cm2) of thiram residues was detected on apple peels. The excellent SERS detection ability of self-assembled Ag NCs/PDMS substrate indicated that it will play an important role in pesticide detection in the future.Graphical abstract