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基于带 Ag-Cu 复合膜的无芯光纤的高灵敏度 SPR 折射率传感器。

A High-Sensitivity SPR Refractive Index Sensor Based on No-Core Fiber with Ag-Cu Composite Films.

机构信息

State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China.

出版信息

Sensors (Basel). 2021 Oct 22;21(21):7000. doi: 10.3390/s21217000.

DOI:10.3390/s21217000
PMID:34770307
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8587283/
Abstract

A fiber/Ag-Cu films surface plasmon resonance (SPR) refractive index (RI) sensor composed of multimode fiber-no-core-fiber-multimode fiber (MMF-NCF-MMF) structure is designed. The sensing region length and Cu film deposition time of sensor are gradually optimized by the control variable method, which finally achieves the improvement of sensor properties. We experimentally compared the sensing performance of the fiber/Ag film and fiber/Ag-Cu films sensor. Experimental results show that the fiber/Ag-Cu films sensor has good linearity (R-square = 0.993), and its sensitivity is as high as 3957 nm/RIU in the refractive index detection range of 1.3328-1.3853, which is 1109 nm/RIU higher than the sensitivity of a conventional fiber/Ag film sensor. The sensor presented in this paper adopts the structure with composite metal film, which outperforms the common single-layer metal film in chemical stability such as oxidation resistance and mechanical hardness. Meanwhile, the SPR sensor with MMF-NCF-MMF structure has the advantages of convenient manufacture and compact structure. In conclusion, it can bestow a unique advantage in the field of biological detection or chemical analysis.

摘要

一种由多模光纤-无芯光纤-多模光纤（MMF-NCF-MMF）结构组成的纤维/Ag-Cu 薄膜表面等离子体共振（SPR）折射率（RI）传感器被设计出来。通过控制变量法逐渐优化传感器的传感区域长度和 Cu 薄膜沉积时间，最终实现了传感器性能的提高。我们通过实验比较了纤维/Ag 薄膜和纤维/Ag-Cu 薄膜传感器的传感性能。实验结果表明，纤维/Ag-Cu 薄膜传感器具有良好的线性度（R 平方=0.993），在折射率检测范围为 1.3328-1.3853 时，其灵敏度高达 3957nm/RIU，比传统的纤维/Ag 薄膜传感器的灵敏度高 1109nm/RIU。本文提出的传感器采用复合金属膜结构，在抗氧化和机械硬度等化学稳定性方面优于常见的单层金属膜。同时，具有 MMF-NCF-MMF 结构的 SPR 传感器具有制造方便、结构紧凑的优点。综上所述，它在生物检测或化学分析领域具有独特的优势。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/9d945003245b/sensors-21-07000-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/90703562c26a/sensors-21-07000-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/cb1b0b335920/sensors-21-07000-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/f7861e8db59d/sensors-21-07000-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/9d945003245b/sensors-21-07000-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/f116c8ac8d2b/sensors-21-07000-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/ceacf5bb00eb/sensors-21-07000-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/587f785ec323/sensors-21-07000-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/ce493d1ecb9b/sensors-21-07000-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/90703562c26a/sensors-21-07000-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/77f0faedf3af/sensors-21-07000-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/c739c9863d29/sensors-21-07000-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/cb1b0b335920/sensors-21-07000-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/f77e9c55f1d6/sensors-21-07000-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/fb2d75187ff9/sensors-21-07000-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/f7861e8db59d/sensors-21-07000-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/43a5/8587283/9d945003245b/sensors-21-07000-g012.jpg

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