Abstract
The development of efficient sensors for rapid and accurate detection of explosives is a critical requirement for various security and safety applications. In this study, we present a novel approach that utilizes a terahertz sensor enhanced by graphene and a gold metasurface deposited on a glass substrate for the identification of nitroglycerine, TNT, and RDX. The integration of these nanomaterials into the sensor design significantly enhances its sensitivity and specificity to trace amounts of explosives. This innovative sensor offers a multifaceted approach to achieve both high sensitivity and specificity by leveraging the unique characteristics of gold, graphene, and glass within a metasurface architecture. The implications of these are substantial, indicating the sensor’s significant promise in forensic drug detection. The results highlight the exceptional performance traits of the proposed graphene metasurface sensor. With a maximum sensitivity of 927 GHz/RIU and a detection limit of 0.189 RIU − 1, the sensor showcases its impressive capabilities. Additionally, the sensor resolutions and FOM, calculated at 0.025 and 4.905 RIU-1, respectively, underscore its ability to precisely measure even the most delicate alterations in the refractive index.
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The data supporting the findings in this work are available from the corresponding author with a reasonable request.
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Acknowledgements
The authors are thankful to the Deanship of Scientific Research at Najran University for funding this work under the Research Groups Funding Program grant code (NU/RG/SERC/12/4).
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The authors are thankful to the Deanship of Scientific Research at Najran University for funding this work under the Research Groups Funding Program grant code (NU/RG/SERC/12/4).
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Conceptualization, J.W. and H.B.A.; methodology, J.W., H.B.A., and A.K.U.; software, J.W., A.K.U., and H.B.A.; investigation, M.J., A.H.M.A., and A.A.; formal analysis, all authors; writing—original draft preparation, all authors; writing—review and editing, all authors. All authors have read and agreed to the published version of the manuscript.
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Wekalao, J., U., A.K., Albargi, H.B. et al. Graphene and Gold Metasurface-Based Terahertz Surface Plasmon Resonance Sensor for Explosive Detection. Plasmonics (2024). https://doi.org/10.1007/s11468-024-02229-0
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DOI: https://doi.org/10.1007/s11468-024-02229-0