Compact Shielding of Graphene Monolayer Leads to Extraordinary SERS-Active Substrate with Large-Area Uniformity and Long-Term Stability.
Compact Shielding of Graphene Monolayer Leads to Extraordinary SERS-Active Substrate with Large-Area Uniformity and Long-Term Stability.
复制标题
石墨烯单层的紧凑屏蔽可产生具有大面积均匀性和长期稳定性的非凡 SERS 活性基底
DOI：
10.1038/srep17167
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发表时间：
2015-11-30
影响因子：
4.6
通讯作者：
Ying Y
中科院分区：
文献类型：
--
作者：
Liu X;Wang J;Wu Y;Fan T;Xu Y;Tang L;Ying Y
表面增强拉曼散射（Sers）技术可以有效地增强分子本身微弱的拉曼散射信号，并提供分子在表面的详细结构信息和结合性质。尽管这项技术有着悠久的历史，但Sers在实际应用中尚未成为一种复杂的分析工具。一个主要的障碍是缺乏高质量和稳定的SERS活性基底。在这项工作中，我们报告了单层石墨烯屏蔽的周期性金属纳米结构作为大面积均匀和长期稳定的Sers基底。单层石墨烯作为腐蚀屏障，不仅大大提高了基底的稳定性，而且赋予了基底许多新的功能，如减轻光致损伤和提高对某些在常规金属基底上弱吸附的分析物的检测灵敏度。此外，我们的制作策略也能够制作可重复的Sers传感点阵列，这可能是一个有前途的高通量或多分析物传感平台。总之，石墨烯屏蔽的Sers基底在Sers效应的基础研究和许多实际领域都具有很大的前景。
Surface-enhanced Raman scattering (SERS) can significantly boost the inherently weak Raman scattering signal and provide detailed structural information and binding nature of the molecules on the surface. Despite the long history of this technology, SERS has yet to become a sophisticated analytical tool in practical applications. A major obstacle is the absence of high-quality and stable SERS-active substrate. In this work, we report a monolayer graphene-shielded periodic metallic nanostructure as large-area uniform and long-term stable SERS substrate. The monolayer graphene acting as a corrosion barrier, not only greatly enhanced stability, but also endowed many new features to the substrate, such as alleviating the photo-induced damages and improving the detection sensitivity for certain analytes that are weakly adsorbed on the conventional metallic substrates. Besides, our fabrication strategy were also capable of fabricating the reproducible SERS sensing spots array, which may serve as a promising high-throughput or multi-analyte sensing platform. Taken together, the graphene-shielded SERS substrate holds great promise both in fundamental studies of the SERS effect and many practical fields.