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Au@Ag致密单层膜的组装及对农药残留的SERS检测

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周侠, 张莉, 王红艳, 王雪艳, 杨良保. Au@Ag致密单层膜的组装及对农药残留的SERS检测[J]. 环境工程学报, 2018, 12(5): 1318-1325. doi: 10.12030/j.cjee.201709086
引用本文: 周侠, 张莉, 王红艳, 王雪艳, 杨良保. Au@Ag致密单层膜的组装及对农药残留的SERS检测[J]. 环境工程学报, 2018, 12(5): 1318-1325. doi: 10.12030/j.cjee.201709086
shu
ZHOU Xia, ZHANG Li, WANG Hongyan, WANG Xueyan, YANG Liangbao. Assembly of Au@Ag monolayer membrane and SERS detection of pesticide residues[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1318-1325. doi: 10.12030/j.cjee.201709086
Citation: ZHOU Xia, ZHANG Li, WANG Hongyan, WANG Xueyan, YANG Liangbao. Assembly of Au@Ag monolayer membrane and SERS detection of pesticide residues[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1318-1325. doi: 10.12030/j.cjee.201709086
shu

Au@Ag致密单层膜的组装及对农药残留的SERS检测

  • 1.

    宿州学院化学化工学院，宿州 234000

  • 2.

    中国科学院合肥智能机械研究所，合肥 230031

  • 基金项目:

    宿州学院科研平台开放课题项目 (2014YKF45，2015ykf16，2015ykf17)

    国家自然科学基金资助项目 (21571180)

    安徽省教育厅大学生创新创业训练项目 (201510379136)

    安徽省教育厅高校科研平台创新团队建设项目 (2016SCXPTTD)

    安徽省教育厅自然科学重点项目 (KJ2015A271, KJ2016A888, KJ2017A434)

    宿州学院自然科学研究重点项目 (2016yzd03)

Assembly of Au@Ag monolayer membrane and SERS detection of pesticide residues

  • 1.

    School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, China

  • 2.

    Institite of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China

  • Fund Project:

  • 摘要: 采用聚合物溶液组装法构筑致密Au@Ag核壳单层膜结构，用作SERS基底检测有机磷农药具有高灵敏性和重现性。Au@Ag核壳纳米立方体首先通过种子生长法合成，然后用功能化的配体聚乙二醇巯基（mPEG–SH）进行修饰获得有序的致密单层膜结构。该结构的形成归因于适量mPEG–SH的加入可以精确调节颗粒间以及颗粒与基底间的相互作用力，使得基底表面的纳米粒子重新排列。这种有序的单层膜结构用作SERS基底具有稳定和高重现的SERS信号，用于检测乙基对氧磷农药残留时检测限低至10-8 mol·L-1（2.75 μg·mL-1）。该聚合物组装方法为构建高灵敏和高重现性的SERS基底提供了一个有效的途径，为SERS技术在农药残留检测领域的推广应用打下了基础。
    Abstract: Au@Ag core-shell monolayer film with dense arrangement was built by a simple polyethylene glycol assembly method, and used as SERS substrate to detect organophosphorus pesticides with highly sensitivity and reproducibility. Au@Ag core-shell nanostructures were synthesized by simple seed growth method firstly, and then modified with methoxypolyethylene glycol mercapto (mPEG-SH) to obtain ordered dense monolayer structure. The formation of this structure attribute to an appropriate amount of mPEG-SH added to precisely regulate the interaction of the particles and between the particles and the substrate. This ordered monolayer nanostructures used as SERS substrates with highly uniform and reproducible SERS signals for the detection of organophosphorus pesticide residues, and the detection limits low to 10-8 mol·L-1 (2.75 μg·mL-1). This polymer assembling method provides an effective way to construct a practical SERS substrate with high sensitivity and reproducibility, and gives the basis for the application of pesticide residues detection.
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  • 刊出日期:  2018-05-19

Au@Ag致密单层膜的组装及对农药残留的SERS检测

  • 1. 宿州学院化学化工学院，宿州 234000
  • 2. 中国科学院合肥智能机械研究所，合肥 230031
基金项目:

宿州学院科研平台开放课题项目 (2014YKF45，2015ykf16，2015ykf17)

国家自然科学基金资助项目 (21571180)

安徽省教育厅大学生创新创业训练项目 (201510379136)

安徽省教育厅高校科研平台创新团队建设项目 (2016SCXPTTD)

安徽省教育厅自然科学重点项目 (KJ2015A271, KJ2016A888, KJ2017A434)

宿州学院自然科学研究重点项目 (2016yzd03)

摘要: 采用聚合物溶液组装法构筑致密Au@Ag核壳单层膜结构，用作SERS基底检测有机磷农药具有高灵敏性和重现性。Au@Ag核壳纳米立方体首先通过种子生长法合成，然后用功能化的配体聚乙二醇巯基（mPEG–SH）进行修饰获得有序的致密单层膜结构。该结构的形成归因于适量mPEG–SH的加入可以精确调节颗粒间以及颗粒与基底间的相互作用力，使得基底表面的纳米粒子重新排列。这种有序的单层膜结构用作SERS基底具有稳定和高重现的SERS信号，用于检测乙基对氧磷农药残留时检测限低至10-8 mol·L-1（2.75 μg·mL-1）。该聚合物组装方法为构建高灵敏和高重现性的SERS基底提供了一个有效的途径，为SERS技术在农药残留检测领域的推广应用打下了基础。

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