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Graphene‐TMDC‐graphene hybrid plasmonic metasurface for enhanced biosensing: a theoretical analysis

swin0826 添加于 2017/10/23 14:20:56  840次阅读 | 0次推荐 | 0个评论

In this work, a plasmonic metasurface for ultra-sensitive biosensing based on graphene-transition metal dichalcogenide (TMDC)-graphene hybrid nanostructures are designed. The coating of the two-dimensional nanosheets plays an important role for the sensitivity enhancement of the biosensors at the atomic scale. To achieve the maximum plasmon resonance energy transfer, different parameters of the hybrid nanostructures are systematically investigated including the material types and the number of TMDC layers. The important characteristics of plasmonic biosensors such as dark minimum reflectivity, sharp differential phase change, high sensitivity and narrow full width at half maximum (FWHM) are carefully studied in this work to demonstrate the improved surface plasmon resonance sensing performances of the TMDC-based metasurfaces. The graphene-TMDC-graphene configurations with four different types of materials including MoS2/WS2/MoSe2/WSe2 are optimized respectively for potential sensing applications. Based on our theoretical analysis, the enhanced maximum sensitivity of graphene-TMDC-graphene hybrid nanostructure is three orders of magnitude higher than that of the conventional bare metallic substrate.

作 者:Li Jiang, Shuwen Zeng, Qingling Ouyang, Xuan‐Quyen Dinh, Philippe Coquet, Junle Qu, Sailing He, Ken‐Tye Yong
期刊名称: Physica Status Solidi A: Applications And Materials Science
期卷页: 2017/10 第1卷 第1期 563页
学科领域:化学科学 » 无机化学 » 无机纳米化学
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原文链接:https://www.researchgate.net/publication/320460476_Graphene-TMDC-Graphene_Hybrid_Plasmonic_Metasurface_for_Enhanced_Biosensing_A_Theoretical_Analysis
DOI: 10.1002/pssa.201700563
ISBN: 1862-6319
关键词: biosensing, graphene-TMDC-graphene, metasurface, plasmonic
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