Gold nanolenses generated by laser ablation-efficient enhancing structure for surface enhanced Raman scattering analytics and sensing
Gold nanolenses generated by laser ablation-efficient enhancing structure for surface enhanced Raman scattering analytics and sensing
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DOI：
10.1021/ac8002215
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发表时间：
2008-06-01
影响因子：
7.4
通讯作者：
Kneipp, Katrin
中科院分区：
文献类型：
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作者：
Kneipp, Janina;Li, Xiangting;Kneipp, Katrin
由不同半径和颗粒间距离的金属球形成的纳米聚集体代表有限的、确定性的、自相似的系统，其有效地集中光场并充当“纳米透镜”。在这里，我们实验验证了纳米透镜的理论概念，并探讨其作为增强纳米结构在表面增强拉曼散射（Sers）的潜力。利用激光烧蚀技术将金纳米球烧蚀到水中，得到了不同尺寸的金纳米球形成的自相似结构。这些纳米透镜表现出10（9）量级的Sers增强因子。“化学清洁”制备过程提供了优于化学制备的纳米聚集体的几个优点，并且使得稳定且生物相容的金纳米透镜有效增强用于各种分析和传感应用的结构。
Nanoaggregates formed by metal spheres of different radii and interparticle distances represent finite, deterministic, self-similar systems that efficiently concentrate optical fields and act as "nanolenses". Here we verify experimentally the theoretical concept of nanolenses and explore their potential as enhancing nanostructures in surface enhanced Raman scattering (SERS). Self-similar structures formed by gold nanospheres of different sizes are generated by laser ablation from solid gold into water. These nanolenses exhibit SERS enhancement factors on the order of 10(9). The "chemically clean" preparation process provides several advantages over chemically prepared nanoaggregates and makes the stable and bio-compatible gold nanolenses potent enhancing structures for various analytical and sensing applications.