Highly Sensitive and Self-Calibrating Fiber Optic SPR Methane Sensor Based on Graphene–MoS2 Heterostructure

IF 4.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2025-05-29 DOI:10.1007/s11468-025-03046-9

Pengxiao Xu, Minghui Huo, Xiaokang Wang, Longyu Xu, Jingchao Bao, Aolin Hou, Yundong Liu, Xiaojian Meng, Kun Yu, Yufang Liu

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Abstract

Methane, a highly flammable and explosive gas, poses significant safety risks and challenges for industrial applications. A highly sensitive sensor based on surface plasmon resonance within a photonic crystal fiber is presented and fully analyzed. This sensor measures methane concentration while providing self-calibration. The photonic crystal fiber features a D-type structure with grooves, where composite two-dimensional material film and gold films are deposited. Additionally, a methane-sensitive layer containing cryptophane-A is coated on the surface of the D-type structure. The finite element method is utilized to analyze and compare the coating of different two-dimensional materials (graphene, MoS₂, and graphene–MoS₂) on the simulation analysis of sensor sensitivity. The use of graphene–MoS₂ composite two-dimensional material not only enhances the sensing performance but also excites the double-peak effect. This double-peak effect enables the methane sensor to measure at different wavelengths, with the primary and secondary peaks calibrated against each other to improve the sensor's accuracy. The results show that the surface plasmon resonance based on photonic crystal fiber sensor with graphene–MoS₂ composite membrane has better sensing performance. The maximum wavelength sensitivity and average wavelength sensitivity reached 80 and 63.4 nm/%, respectively, over the range of methane concentrations from 0.5 to 3.5%. These properties are significantly better than those of recently reported methane sensors. Therefore, the sensor has excellent application prospects in miniature methane detection field.

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基于石墨烯- mos2异质结构的高灵敏度自校准光纤SPR甲烷传感器

甲烷是一种高度易燃易爆的气体，对工业应用构成了重大的安全风险和挑战。提出了一种基于光子晶体光纤表面等离子体共振的高灵敏度传感器，并对其进行了分析。该传感器测量甲烷浓度，同时提供自校准。光子晶体光纤具有带凹槽的d型结构，在凹槽中沉积复合二维材料薄膜和金薄膜。此外，在d型结构的表面涂覆含有隐烷- a的甲烷敏感层。利用有限元方法分析比较了不同二维材料（石墨烯、MoS2和石墨烯- MoS2）涂层对传感器灵敏度的模拟分析。石墨烯-二硫化钼复合二维材料的使用不仅提高了传感性能，而且激发了双峰效应。这种双峰效应使甲烷传感器能够在不同的波长进行测量，主峰和次峰相互校准，以提高传感器的精度。结果表明，基于石墨烯-二硫化钼复合膜的表面等离子体共振光子晶体光纤传感器具有较好的传感性能。在甲烷浓度为0.5 ~ 3.5%范围内，最大波长灵敏度为80 nm/%，平均波长灵敏度为63.4 nm/%。这些性能明显优于最近报道的甲烷传感器。因此，该传感器在微型甲烷检测领域具有良好的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.