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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >A novel U-bent plastic optical fibre local surface plasmon resonance sensor based on a graphene and silver nanoparticle hybrid structure
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A novel U-bent plastic optical fibre local surface plasmon resonance sensor based on a graphene and silver nanoparticle hybrid structure

机译：基于石墨烯和银纳米粒子混合结构的新型U形弯塑光光纤局部等离子体谐振传感器

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摘要

In this work, we have presented a novel local surface plasmon resonance (LSPR) sensor based on the U-bent plastic optical fibre (U-POF). Firstly, a layer of discontinuous silver (Ag) thin film was deposited on the U-POF and then the Ag film was covered by a layer of cladding synthesized by polyvinyl alcohol (PVA), graphene and silver nanoparticles forming the PVA/G/AgNPs@ Ag film. The normalized transmittance spectrum of the LSPR sensor have been collected in a range of the refractive index (RI) from 1.330 to 1.3657 in ethanol solution, and 700.3 nm/RIU sensitivity of the developed LSPR sensor has been demonstrated. By experiments, we demonstrated that the graphene could improve the sensitivity of the LSPR sensor and delay the oxidation process of the AgNPs effectively to keep the stability of the LSPR sensor. The LSPR sensor also exhibited good sensitivity and linearity in the detection of glucose solutions. This work shows that the developed LSPR sensor may have promising applications in biosensing.
机译：在这项工作中，我们介绍了一种基于U型弯曲塑料光纤（U-POF）的新型局部表面等离子体共振（LSPR）传感器。首先，将一层不连续银（Ag）薄膜沉积在U-POF上，然后通过聚乙烯醇（PVA），石墨烯和银纳米粒子合成的一层包层覆盖Ag膜，形成PVA / G / AgNP @ AG电影。已经在乙醇溶液中的1.330至1.3657的折射率（RI）的范围内收集了LSPR传感器的归一化透射谱，已经证明了发育的LSPR传感器的700.3nm / RiU灵敏度。通过实验，我们证明了石墨烯可以提高LSPR传感器的灵敏度，并有效地延迟AGNP的氧化过程以保持LSPR传感器的稳定性。 LSPR传感器在葡萄糖溶液的检测中也表现出良好的敏感性和线性度。这项工作表明，开发的LSPR传感器可能在生物传感中具有有希望的应用。

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