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首页> 外文期刊>RSC Advances >Tailoring gold and silver colloidal bimetallic nanoalloys towards SERS detection of rhodamine 6G
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Tailoring gold and silver colloidal bimetallic nanoalloys towards SERS detection of rhodamine 6G

机译：量身定制金银胶体双金属纳米合金用于SERS检测罗丹明6G

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Nanoparticles of gold, silver and their bimetallic alloys have been prepared by an adapted method of reduction of the aqueous salts using sodium borohydride. It is demonstrated that the temperature and order of addition of the corresponding salt solutions influence the nanoalloys chemical arrangement giving different surface plasmon resonance behavior. The colloidal dispersions show very good Surface-Enhanced Raman Spectroscopy (SERS) signal towards rhodamine 6G. The obtained nanoparticles were then successfully deposited onto glass supports by evaporation of the respective colloids and also used as functional SERS sensors with efficient detection of trace amounts of the analyzed dye. These spectroscopic studies demonstrated that both mono and bimetallic nanoparticles show very good SERS sensitivity with the advantage of being prepared using a straightforward synthetic method in the absence of an additional stabilizer as needed for commonly used core–shell systems.
机译：金，银和它们的双金属合金的纳米颗粒已经通过使用硼氢化钠还原含水盐的合适方法制备。结果表明，温度和相应盐溶液的添加顺序会影响纳米合金的化学排列，从而产生不同的表面等离振子共振行为。胶体分散液对罗丹明6G的表面增强拉曼光谱（SERS）信号非常好。然后，通过蒸发各自的胶体，将获得的纳米颗粒成功地沉积到玻璃载体上，并用作有效检测痕量分析染料的功能性SERS传感器。这些光谱研究表明，单金属和双金属纳米颗粒均显示出非常好的SERS敏感性，其优点是使用直接合成方法制备，而没有通常核-壳系统所需的额外稳定剂。

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