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Photoinduced synthesis of Ag nanoparticles on ZnO nanowires for real-time SERS systems

机译:ZnO纳米线对实时SERS系统的AG纳米粒子的合成

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摘要

We developed a photoinduced synthesis method for fabricating metal nanoparticles (NPs) embedded on the surfaces of metal oxide nanowires (NWs) to form hierarchical nanostructures. The process consisted of two steps: (1) the preparation of a metal oxide NW backbone structure, and (2) the photoinduced synthesis of metal NPs on the backbone structure. ZnO NWs were first prepared and reduced to form metal oxide NWs. UV light was used to generate electron-hole pairs at the metal oxide NW surface. The excited electrons successfully reduced Ag ions in solution to form Ag NPs on the ZnO NW surfaces without introducing contamination or side-reactions. The surface-enhanced Raman spectroscopy (SERS) properties of the hierarchical materials were investigated for various Ag nanostructure morphologies. The SERS activity revealed an outstanding enhancement factor of 6.36 x 10(11). A range of glucose solution concentrations was detected using the SERS method in conjunction with the hierarchical materials. The hierarchical materials were deployed in a microfluidic system to sequentially detect distinct molecules as they flowed through the channel. The photoinduced synthesis process required only simple, low-cost, and environmentally benign fabrication conditions.
机译:我们开发了一种用于制造嵌入金属氧化物纳米线(NWS)表面上的金属纳米颗粒(NPS)的光诱导的合成方法,以形成分层纳米结构。该方法由两个步骤组成:(1)制备金属氧化物NW骨架结构,(2)在骨干结构上光诱导金属NP的合成。首先制备和还原ZnO NWS以形成金属氧化物NWS。 UV光用于在金属氧化物NW表面上产生电子空穴对。激发的电子成功地降低了溶液中的Ag离子,在ZnO NW表面上形成Ag NP而不引入污染或副反应。研究了分层材料的表面增强拉曼光谱(SERS),用于各种Ag纳米结构形态。 SERS活动显示出优异的增强因子为6.36 x 10(11)。使用SERS方法与等级材料一起检测一系列葡萄糖溶液浓度。分层材料部署在微流体系统中,以顺序地检测通过通道流过的不同分子。光诱导的合成过程仅需要简单,低成本和环境良性制造条件。

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  • 来源
    《RSC Advances》 |2015年第1期|共7页
  • 作者单位

    Korea Adv Inst Sci &

    Technol Dept Mech Engn Taejon 305701 South Korea;

    Korea Adv Inst Sci &

    Technol Dept Mech Engn Taejon 305701 South Korea;

    Korea Adv Inst Sci &

    Technol Dept Mech Engn Taejon 305701 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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