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Three-Dimensional Metamaterial for Plasmon-Enhanced Raman Scattering at any Excitation Wavelengths from the Visible to Near-Infrared Range
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-12-21 , DOI: 10.1021/acs.analchem.0c03220 Cai-Feng Shi 1 , Bo Zheng 1 , Jian Li 1 , Yue Zhou 1 , Hai-Ling Liu 1 , Saud Asif Ahmed 1 , Kang Wang 1 , Xing-Hua Xia 1
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-12-21 , DOI: 10.1021/acs.analchem.0c03220 Cai-Feng Shi 1 , Bo Zheng 1 , Jian Li 1 , Yue Zhou 1 , Hai-Ling Liu 1 , Saud Asif Ahmed 1 , Kang Wang 1 , Xing-Hua Xia 1
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Plasmonic materials with highly confined electromagnetic fields at resonance wavelengths have been widely used to enhance Raman scattering signals. To achieve the maximum enhancement, the resonance peaks of the plasmonic materials should overlap with the excitation and emission wavelengths of target molecules, which is difficult for most of the plasmonic materials possessing a few narrow resonance peaks. Here, we report an ultrabroadband plasmonic metamaterial absorber (BPMA) that can absorb 99% of the incident light energy and excite plasmon resonance from the ultraviolet to near-infrared range (250–1900 nm), which allows us to observe efficient plasmon-enhanced Raman scattering (PERS) with any excitation sources. As demonstrated by the investigation on a self-assembled monolayer of the nonresonant molecule 4-mercaptobenzonitrile, the BPMA exhibits high PERS performance with a detection limit of down to 10–12 M under any excitation sources of three different lasers and excellent uniformity (∼5.51%) and reproducibility (∼5.50%), which corroborates the potential for high-throughput production with low cost and at a large scale. This work offers a novel platform for anti-interference PERS analysis in dynamic and complex environments.
中文翻译：
在可见光到近红外范围内任何激发波长下等离子增强拉曼散射的三维超材料
在共振波长处具有高度受限电磁场的等离子体材料已被广泛用于增强拉曼散射信号。为了实现最大程度的增强，等离激元材料的共振峰应与目标分子的激发和发射波长重叠，这对于大多数具有几个窄共振峰的等离激元材料来说是困难的。在这里，我们报告了一种超宽带等离子体超材料吸收器（BPMA），它可以吸收99％的入射光能并激发从紫外线到近红外范围（250–1900 nm）的等离子体共振，这使我们能够观察到有效的等离子体增强任何激发源的拉曼散射（PERS）。正如对非共振分子4-巯基苄腈的自组装单分子层的研究所证明的，在三种不同激光的任何激发源下为–12 M，具有出色的均匀性（〜5.51％）和可重复性（〜5.50％），从而证实了低成本，大规模大规模生产高产量的潜力。这项工作为动态和复杂环境中的抗干扰PERS分析提供了一个新颖的平台。
更新日期：2021-01-26
中文翻译：
在可见光到近红外范围内任何激发波长下等离子增强拉曼散射的三维超材料
在共振波长处具有高度受限电磁场的等离子体材料已被广泛用于增强拉曼散射信号。为了实现最大程度的增强，等离激元材料的共振峰应与目标分子的激发和发射波长重叠，这对于大多数具有几个窄共振峰的等离激元材料来说是困难的。在这里，我们报告了一种超宽带等离子体超材料吸收器（BPMA），它可以吸收99％的入射光能并激发从紫外线到近红外范围（250–1900 nm）的等离子体共振，这使我们能够观察到有效的等离子体增强任何激发源的拉曼散射（PERS）。正如对非共振分子4-巯基苄腈的自组装单分子层的研究所证明的，在三种不同激光的任何激发源下为–12 M，具有出色的均匀性（〜5.51％）和可重复性（〜5.50％），从而证实了低成本，大规模大规模生产高产量的潜力。这项工作为动态和复杂环境中的抗干扰PERS分析提供了一个新颖的平台。
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