Au-Graphene Hybrid Plasmonic Nanostructure Sensor Based on Intensity Shift

Author: Alharbi Raed   Irannejad Mehrdad   Yavuz Mustafa  

Publisher: MDPI

E-ISSN: 1424-8220|17|1|191-191

ISSN: 1424-8220

Source: Sensors, Vol.17, Iss.1, 2017-01, pp. : 191-191

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Abstract

Integrating plasmonic materials, like gold with a two-dimensional material (e.g., graphene) enhances the light-material interaction and, hence, plasmonic properties of the metallic nanostructure. A localized surface plasmon resonance sensor is an effective platform for biomarker detection. They offer a better bulk surface (local) sensitivity than a regular surface plasmon resonance (SPR) sensor; however, they suffer from a lower figure of merit compared to that one in a propagating surface plasmon resonance sensors. In this work, a decorated multilayer graphene film with an Au nanostructures was proposed as a liquid sensor. The results showed a significant improvement in the figure of merit compared with other reported localized surface plasmon resonance sensors. The maximum figure of merit and intensity sensitivity of 240 and 55 RIU−1 (refractive index unit) at refractive index change of 0.001 were achieved which indicate the capability of the proposed sensor to detect a small change in concentration of liquids in the ng/mL level which is essential in early-stage cancer disease detection.