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Sensors 2017, 17(1), 191;

Au-Graphene Hybrid Plasmonic Nanostructure Sensor Based on Intensity Shift

Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 10 November 2016 / Revised: 13 January 2017 / Accepted: 17 January 2017 / Published: 19 January 2017
(This article belongs to the Special Issue MEMS and Nano-Sensors)
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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. View Full-Text
Keywords: hybrid nanostructure; graphene; LSPR sensor; intensity shift; sensitivity hybrid nanostructure; graphene; LSPR sensor; intensity shift; sensitivity

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Alharbi, R.; Irannejad, M.; Yavuz, M. Au-Graphene Hybrid Plasmonic Nanostructure Sensor Based on Intensity Shift. Sensors 2017, 17, 191.

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