Raman peak enhancement and shift of few-layer graphene induced by plasmonic coupling with silver nanoparticles

Raman peak enhancement and shift of few-layer graphene induced by plasmonic coupling with silver nanoparticles
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银纳米粒子等离激元耦合引起的少层石墨烯拉曼峰增强和位移

DOI:
10.1063/1.4869577
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发表时间:
2014-03
影响因子:
4
通讯作者:
Zhao Y. J.
Zhao Y. J.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang S. G.;Zhang X. W.;Liu X.;Yin Z. G.;Wang H. L.;Gao H. L.;Zhao Y. J.

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将几层石墨烯直接转移到银纳米颗粒的表面,并研究了石墨烯与银纳米颗粒的局域表面等离子体(LSP)之间的耦合作用。我们发现,等离子体银纳米粒子的近场作用使石墨烯的表面增强拉曼光谱增加了近7倍,并且石墨烯G峰的增强因子随着粒子尺寸的增大而增大。同时,在石墨烯的存在下,银纳米颗粒的发光共振峰红移了10 nm,展宽了13 nm,这可以归因于银纳米颗粒与石墨烯的耦合作用。
Few-layer graphene was transferred directly on top of Ag nanoparticles, and the coupling between graphene and localized surface plasmons (LSPs) of Ag nanoparticles was investigated. We found that the surface enhanced Raman spectroscopy of graphene was increased approximately 7-fold by near-fields of plasmonic Ag nanoparticles and the enhancement factor of graphene G peak increased with the particle size. Meanwhile, the LSP resonances of Ag nanoparticles exhibit a 10 nm redshift and a 13 nm broadening by the presence of graphene, which can be attributed to the coupling between the Ag LSPs and the graphene.
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