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首页> 外文期刊>RSC Advances >High-yield colloidal synthesis of monometallic Au nanorod–Au nanoparticle dimers and their application in SERS
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High-yield colloidal synthesis of monometallic Au nanorod–Au nanoparticle dimers and their application in SERS

机译：单金属金纳米棒-金纳米颗粒二聚体的高产率胶体合成及其在SERS中的应用

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Dimeric nanostructures have attracted much attention owing to their unique structure and excellent physiochemical properties. However, it has been very difficult to make monometallic nanodimers. In this work, we report a simple colloidal approach to synthesize high-yield monometallic Au nanorod–Au nanoparticle dimers by using a negatively charged polyelectrolyte, poly(sodium-p-styrenesulfonate) (PSS), to modify the positively charged Au nanorods. The growth process is studied by systematically tuning the reaction parameters. The as-obtained dimers can serve as a great SERS substrate for the detection of organic molecules because of the existence of “hot-spots”. The analytical enhancement factor (AEF) of the as-prepared dimers is up to 106, which is two magnitudes higher than that of Au nanorods.
机译：二聚体纳米结构由于其独特的结构和出色的理化特性而备受关注。然而，制造单金属纳米二聚体非常困难。在这项工作中，我们报告了一种简单的胶体方法，该方法通过使用带负电荷的聚电解质聚（-em> p -苯乙烯磺酸钠）（PSS）来修饰高产率的单金属Au纳米棒-Au纳米颗粒二聚体带正电的金纳米棒。通过系统地调节反应参数来研究生长过程。由于存在“热点”，因此获得的二聚体可作为用于检测有机分子的优质SERS底物。所制备的二聚体的分析增强因子（AEF）最高为10 6 ，比Au纳米棒高两个数量级。

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