Combined Visible Plasmons of Ag Nanoparticles and Infrared Plasmons of Graphene Nanoribbons for High-Performance Surface-Enhanced Raman and Infrared Spectroscopies
Combined Visible Plasmons of Ag Nanoparticles and Infrared Plasmons of Graphene Nanoribbons for High-Performance Surface-Enhanced Raman and Infrared Spectroscopies
复制标题
用于高性能表面增强拉曼和红外光谱的银纳米粒子的可见等离子体和石墨烯纳米带的红外等离子体的组合
DOI：
10.1002/smll.202004640
复制
发表时间：
2020-12-07
期刊：
影响因子：
13.3
通讯作者：
Wei, Wei
中科院分区：
文献类型：
--
作者：
Nong, Jinpeng;Tang, Linlong;Wei, Wei
银纳米颗粒修饰的石墨烯纳米带（GNRs）被认为是表面增强拉曼和红外吸收光谱（Sers和SEIRAS）的高性能共享基底。这是通过同时调制可见光区的Ag NP和中红外区的GNR的局域等离子体共振来实现的，以便选择性地采用每个共振来在单个基底上获得Sers和SEIRAS。作为概念的证明，通过在法布里-珀罗（Fabry-Perot）型腔上制造GNR，随后通过退火处理沉积薄Ag膜以实现Ag NP来制备共享衬底。从Sers和SEIRAS光谱中可以提取出罗丹明6 G分子的互补拉曼和红外活性振动模式。通过优化银纳米颗粒的尺寸，可以实现10（5）的数量级的Sers增强因子，这是可比的，甚至大于报告的共享衬底。同时，各种聚氧化乙烯振动模式可以识别与最大SEIRAS放大高达170倍，这是一个数量级大于已报道的石墨烯等离子体红外传感器。这种具有优异Sers和SEIRAS性能的等离子体纳米传感器在集成的芯片实验室策略上的生物传感应用中具有很好的潜力。
Ag nanoparticles (NPs) modified graphene nanoribbons (GNRs) are proposed to function as the high-performance shared substrates for surface-enhanced Raman and infrared absorption spectroscopy (SERS and SEIRAS). This is realized by modulating the localized plasmonic resonances of Ag NPs in visible region and GNRs in mid-infrared region simultaneously, so as to selectively employ each resonance to acquire SERS and SEIRAS on a single substrate. As a proof of concept, shared substrates are prepared by fabricating GNRs on a Fabry-Perot like cavity, followed by depositing a thin Ag film with annealing treatment to achieve Ag NPs. Complementary Raman and infrared active vibrational modes of rhodamine 6G molecules can be extracted from the SERS and SEIRAS spectra. By optimizing the dimension of Ag NPs, SERS enhancement factors at the order of 10(5) can be achieved, which are comparable with or even larger than that of the reported shared substrates. Meanwhile, various polyethylene oxide vibrational modes can be recognized with maximum SEIRAS amplification up to 170 times, which is one order larger than that of the reported graphene plasmonic infrared sensors. Such plasmonic nanosensor with excellent SERS and SEIRAS performance exhibits promising potential for biosensing applications on an integrated lab-on-a-chip strategy.