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Green method to fabricate porous microspheres for ultrasensitive SERS detection using UV light

机译：用UV光线制造多孔微球的多孔微球体检测

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摘要

A green method was developed to fabricate a novel porous polymer microsphere with SERS activity, which can be used for ultrasensitive detection because of its preconcentration function. Ultraviolet irradiation as "green" reduction was successfully achieved through several complex processes, namely, monomer solidification, hydrogen peroxide photolysis, and silver nanoparticle fabrication, in only one step. During the solidification process, H2O and O-2, which are originally from H2O2 reduction, escaped from the emulsion templates, resulting in various interconnected micro-/nano-channels. The mean pore size of the prepared porous microspheres was 4 mu m, and the specific surface area can reach 31 m(2) g(-1). The silver nanoparticles produced in the reduction process of silver nitrate were deposited on the porous surface of the microsphere and contributed to stable SERS activity with a SERS enhancement factor of up to 3.8 x 10(6) and a low detection limit of 10(-13) M level for rhodamine 6G. This green method provides highly sensitive and uniform SERS substrates and ensures the stability and reliability of our "SERS substrate".
机译：开发了一种绿色方法以制造具有SERS活性的新型多孔聚合物微球，其由于其前浓缩函数而可用于超细检测。通过几种复杂的方法成功地实现了紫外线照射，即“绿色”还原，即单体凝固，过氧化氢光解和银纳米粒子制造中仅在一步中进行。在凝固过程中，最初来自H 2 O 2的H 2 O和O-2从乳液模板中逸出，导致各种互连的微/纳米通道。制备的多孔微球的平均孔径为4μm，比表面积可达31μm（2 )g（-1）。在微球的多孔表面上沉积在银硝酸银的还原过程中，有助于稳定的SERs活性，其柱增强因子高达3.8×10（6），检测限为10（-13）罗丹明6g的m级。该绿色方法提供高度敏感和均匀的SERS基板，并确保我们“SERS基板”的稳定性和可靠性。

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  • 来源
    《RSC Advances》 |2016年第102期|共7页
  • 作者

    Wang Fei; Qiu Yang; Wang Bing-Jie; Wang Hua-Lin; Long Yi-Tao;

  • 作者单位

    East China Univ Sci &

    Technol State Key Lab Chem Engn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol State Key Lab Chem Engn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol State Key Lab Chem Engn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol State Key Lab Chem Engn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Dept Chem State Key Lab Bioreactor Engn Shanghai 200237 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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