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首页> 外文期刊>Journal of industrial and engineering chemistry >Fabrication of Ag nanoaggregates/SiO2 yolk-shell nanoprobes for surface-enhanced Raman scattering
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Fabrication of Ag nanoaggregates/SiO2 yolk-shell nanoprobes for surface-enhanced Raman scattering

机译：用于表面增强拉曼散射的Ag纳米聚集体/ SiO2卵黄壳纳米探针的制备

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Surface-enhanced Raman scattering (SERS) has received much attention due to ultra-high sensitivity in detection of biological and chemical analytes. When SERS is used as tagging probe, several strong points such as high sensitivity and multiplexing capability can resolved several key issues with current optical tagging materials. Our group has reported synthesis of silica-coated silver nanoparticles (NPs) embedded silica NPs (SERS Dots) for bio-applications. Here, we designed and synthesized a new type of hollow-shell type SERS active NP (yolk-shell SERS Dots), which are aggregated silver NPs with a hollow silica nanostructure. The yolk-shell SERS Dots were prepared by adding NaBH4 to SERS Dots, resulting in the prepared NPs exhibiting 2.3 times stronger SERS signals due to aggregation of silver NPs inside the silica shells and generating several hot spots among those silver NPs. Moreover, biotin-conjugated yolk-shell type SERS dots successfully bound streptavidin-Cy5 to demonstrate the potential of yolk-shell SERS dots for bio-detection. These yolk-shell SERS Dots have great potential for bio-imaging and drug delivery applications. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved,
机译：表面增强拉曼散射（SERS）由于在生物和化学分析物的检测中具有超高灵敏度而备受关注。当将SERS用作标记探针时，诸如高灵敏度和多路复用能力之类的强项可以解决当前光学标记材料的几个关键问题。我们的小组报告了用于生物应用的二氧化硅包覆的银纳米颗粒（NPs）嵌入的二氧化硅NPs（SERS点）的合成。在这里，我们设计并合成了一种新型的空心壳型SERS活性NP（卵壳SERS点），它们是具有空心二氧化硅纳米结构的聚集银NP。通过向SERS点中添加NaBH4来制备卵黄壳SERS点，由于二氧化硅壳内的银NP聚集并在这些银NP中产生多个热点，因此制备的NP表现出2.3倍更强的SERS信号。此外，生物素结合的卵黄壳型SERS点成功地结合了链霉亲和素-Cy5，证明了卵黄壳SERS点在生物检测中的潜力。这些蛋黄壳SERS点在生物成像和药物输送应用中具有巨大潜力。 （C）2015韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利，

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