LSPR optical fiber sensor based on 3D gold nanoparticles with monolayer graphene as a spacer

• DOI: 10.1364/oe.453806
• Publication Date: 2022-03-07T07:00:10Z
• Authors: Jingwen Feng; Jinjuan Gao; Wen Yang; Runcheng Liu; Muhammad Shafi; Zhipeng Zha; Cong Liu; Shicai Xu; Tingyin Ning; Shouzhen Jiang
• Keywords: Metal Nanoparticles; Reproducibility of Results; Graphite; Gold; 02 engineering and technology; Surface Plasmon Resonance; 0210 nano-technology; 01 natural sciences; Optical Fibers; 0104 chemical sciences

Localized surface plasmon resonance (LSPR) optical fiber biosensing is an advanced and powerful label-free technique which gets great attention for its high sensitivity to refractive index change in surroundings. However, the pursuit of a higher still challenging should be further investigated. In this paper, based on monolayer graphene/gold nanoparticles (Grm/Au NPs) three-dimensional (3D) hybrid structure, we fabricated D-shaped plastic (D-POF) LSPR sensor using facile two-step method. The coupling enhancement multilayer structure was extremely excited by property stacked Au NPs/Grm layer. We found that number plasmonic layers importance performance sensor. Moreover, optimal electromagnetic field effect three-layer structure. Besides, n*(Grm/Au NPs)/D-POF exhibited outstanding (2160 nm/RIU), linearity (linear fitting coefficient R2 = 0.996) reproducibility. successfully detected concentration glucose, achieving 1317.61 nm/RIU, suggested promising prospect application medicine biotechnology.