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首页> 外文期刊>RSC Advances >Surface-enhanced Raman scattering on a silver film-modified Au nanoparticle-decorated SiO2 mask array
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Surface-enhanced Raman scattering on a silver film-modified Au nanoparticle-decorated SiO2 mask array

机译：银膜改性Au纳米粒子装饰SiO2面膜阵列上的表面增强拉曼散射

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摘要

Nano-structured Ag and Au with well-defined localized surface plasmon resonance (LSPR) are most popularly employed in surface-enhanced Raman scattering (SERS)-related studies. Ag possesses the highest molar extinction coefficient in metals, resulting in a stronger SERS effect than that of Au. However, compared to Au, the serious decay of SERS enhancement in ambient laboratory air limits its reliable application. In this work, we develop a new strategy for preparing highly SERS-active Ag films deposited on Au nanoparticle (NP)-decorated SiO2 mask arrays based on electrochemical methods. The idea is derived from the underpotential deposition (UPD) of metals, which works on enhancing the SERS effect of underneath Au NPs as well as on reducing the decay of surface Ag films. Experimental results indicate that the SERS of Rhodamine 6G (R6G) absorbed on this developed array exhibits a higher intensity by ca. 30-fold, as compared with that of R6G absorbed on the Au NP-based array without the modification of Ag films. This strategy is also practically applicable to the trace detection of solutions containing calcium pyrophosphate dihydrate (CPPD), which is a common form of calcium crystals found in articular cartilage. In addition, aging (in an atmosphere of 50% relative humidity (RH) and 20% (v/v) O-2 at 30 degrees C for 60 day) of the SERS effect observed on this developed array is significantly depressed, which is comparable to that observed on the Au NP-based array without the modification of Ag films.
机译：具有明确定义的局部表面等离子体共振（LSPR）的纳米结构AG和Au最普遍地用于表面增强拉曼散射（SERS）的研究。 AG具有金属中最高的摩尔消光系数，导致比Au的效果更强。然而，与AU相比，环境实验室空气中的SERS增强严重衰减限制了其可靠的应用。在这项工作中，我们开发了一种基于电化学方法制备沉积在Au纳米粒子（NP）的高度SERS-Active AG膜的新策略。该想法是源自金属的潜在沉积（UPD），其适用于增强Au NPS下方的SER效应以及减少表面AG膜的衰减。实验结果表明，在该发达阵列上吸收的罗丹明6G（R6G）的SERS通过CA表现出更高的强度。与在基于Au NP的阵列上吸收的R6G的R6G的r6g相比，30倍而不改变Ag膜。该策略还应用于含有焦磷酸钙二水合物（CPPD）的溶液的痕量检测，其是在关节软骨中发现的常见形式的钙晶体。此外，在该发达的阵列上观察到的SER效应，老化（在50％相对湿度（RH）和20％（v / v）和20％（v / v）o-2）的衰老显着抑制，这是与在基于AU NP的阵列上观察到的阵列相当，而不会改变Ag膜。

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  • 来源
    《RSC Advances》 |2015年第81期|共8页
  • 作者

    Chang Chi-Ching; Chen Liang-Yih; Yang Kuang-Hsuan; Chen Qing-Ye; Liang Yu-Chih; Lin Shyr-Yi; Liu Yu-Chuan;

  • 作者单位

    Taipei Med Univ Grad Inst Clin Med Sch Med Coll Med Taipei 11031 Taiwan;

    Natl Taiwan Univ Sci &

    Technol Dept Chem Engn Taipei 10607 Taiwan;

    Vanung Univ Dept Mat Sci &

    Engn Chung Li City Taiwan;

    Vanung Univ Dept Mat Sci &

    Engn Chung Li City Taiwan;

    Taipei Med Univ Coll Med Sci &

    Technol Sch Med Lab Sci &

    Biotechnol Taipei 11031 Taiwan;

    Taipei Med Univ Dept Gen Med Sch Med Coll Med Taipei 11031 Taiwan;

    Taipei Med Univ Sch Med Coll Med Dept Biochem &

    Mol Cell Biol Taipei 11031 Taiwan;

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  • 正文语种 eng
  • 中图分类 化学;
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