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首页> 外文期刊>Nanotechnology >Extended domains of organized nanorings of silver grains as surface-enhanced Raman scattering sensors for molecular detection
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Extended domains of organized nanorings of silver grains as surface-enhanced Raman scattering sensors for molecular detection

机译：银颗粒的有组织的纳米环的扩展域，作为用于分子检测的表面增强拉曼散射传感器

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摘要

The possibility to synthesize large areas of silver grains organized in nanorings using a simple technique based on nanosphere lithography and electroless plating as a metal deposition method is described for the first time. In addition, we present a systematic SERS study of the obtained long-range ordered silver nanodots and nanorings. The possibility to precisely control the size, the interdistance and the morphology of these nanostructures allows us to systematically investigate the influence of these parameters on SERS. We show that the best possible SERS substrates should not only present optimal sizes, interdistances and shapes, but also a grain-like structure composed of sub-100 nm grains in order to maximize the number of hot-spots. In addition, we show that grains arranged in nanorings present higher enhancement factors (E-F = 5.5 x 10(5)) as compared to similar arrays made of nanodots. A wide range of applications, including real-time monitoring of catalytic surface reactions, environmental and security monitoring as well as clinical and pharmaceutical screening, can be envisaged for these SERS substrates.
机译：首次描述了使用基于纳米球光刻和化学镀的简单技术作为金属沉积方法来合成大面积组织成纳米环的银颗粒的可能性。另外，我们对获得的长程有序银纳米点和纳米环进行系统的SERS研究。精确控制这些纳米结构的尺寸，间距和形态的可能性使我们能够系统地研究这些参数对SERS的影响。我们表明，可能的最佳SERS衬底不仅应具有最佳的尺寸，间距和形状，而且应具有由100 nm以下的晶粒组成的晶粒状结构，以使热点数量最大化。此外，我们证明，与类似的纳米点阵列相比，排列在纳米环中的晶粒具有更高的增强因子（E-F = 5.5 x 10（5））。这些SERS底物的应用范围很广，包括实时催化表面反应监测，环境和安全监测以及临床和药物筛选。

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