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首页> 外文期刊>RSC Advances >Active site-dominated electromagnetic enhancement of surface-enhanced Raman spectroscopy (SERS) on a Cu triangle plate
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Active site-dominated electromagnetic enhancement of surface-enhanced Raman spectroscopy (SERS) on a Cu triangle plate

机译：CU三角形板上表面增强拉曼光谱（SERS）的有源部位主导的电磁增强

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Revealing the sensitivity and selectivity of the Raman enhancement mechanism is extremely significant for disease diagnosis, environmental surveillance, and food safety supervision. In this study, chemical erosion copper triangle plates (CTPs) were employed as SERS substrate to detect the rhodamine B (Rh B) probe molecule at different etching times. A simple and cost-effective method affords unique insights into the surface enrichment of analytes, which could facilitate the high-performance SERS analysis of numerous analytes. The relationship between the Raman intensity and the concentration of Rh B follows the Freundlich model, which means that the wet-etching surface can create SERS-active site attachment Rh B molecules on the CTPs. The morphology of CTPs was modified by H _(2) O _(2) /HCl etchants; however, the composition of CTPs remained stable without oxidation. This proposes that the largest contribution to the enhancement was the hot-spots that can produce surface plasma resonance on the CTPs. The number of hot-spots can be intelligently adjusted by the artificial control of the surface morphology of metal materials, providing an unambiguous improvement in the SERS sensitivity and capability.
机译：揭示拉曼增强机制的敏感性和选择性对于疾病诊断，环境监测和食品安全监督非常显着。在该研究中，化学侵蚀铜三角板（CTP）用作SERS基底以在不同蚀刻时间检测罗丹明B（RH B）探针分子。一种简单且经济高效的方法可以识别分析物的表面富集，这可以促进众多分析物的高性能SERS分析。拉曼强度与RH B浓度之间的关系遵循Freundlich模型，这意味着湿法蚀刻表面可以在CTP上产生SERS-活性位点附着RH B分子。通过H _（2）O _（2）/ HCl蚀刻剂来修饰CTP的形态;然而，在没有氧化的情况下，CTP的组成保持稳定。这提出了对增强的最大贡献是可以在CTP上产生表面等离子体共振的热点。通过金属材料表面形态的人工控制可以智能地调节热点的数量，在SERS敏感度和能力中提供明确的改进。

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