JOURNAL OF LIGHTWAVE TECHNOLOGY
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2025
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IF 4.8
Hongrong Zheng,Xin Kang,Qihao Yang,Haider Syed Irshad,Dingyi Feng,Fu Liu,Xuetao Gan,Biqiang Jiang
Recent increased attention to environmental and health monitoring demands faster response and reliable gas concentration measurement technology. Herein, we propose an optical fiber-based strategy for fast ethanol gas concentration sensing using a tilted fiber grating (TFG) assisted with a nanolayer of HKUST-1. The TFG excites unique cladding mode resonances and strong evanescent field that interact with the in-situ grown HKUST-1 nanolayer that provides a path for the penetration and absorption of ethanol gas. The TFG, functionalized with 281 nm thick HKUST-1 nanolayer, exhibits a sensitivity of 7.7 nm/% over an ethanol gas concentration range of 0∼0.14% and a limit of detection of 35 ppm at room temperature, by tracking the resonance wavelength shift of a cladding mode. Time-domain experiments reveal the response and recovery times of 26.7 s and 10.3 s, respectively, attributed to the high surface area and porosity of the HKUST-1 nanolayer. The proposed fiberoptic ethanol gas sensor offers ease of integration, rapid response, and high repeatability and reliability, making it suitable for applications such as chemical plant leakage monitoring and medical breath analysis.
研究领域:
光纤传感
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气体传感技术
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纳米材料功能化
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环境监测
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健康监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MODERN OPTICS
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2020
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IF 1.544
Ying Xu,Zhe Zhang,Ru-meng Yi,Xiang-dong Guo,Zhi-mei Qi
In this work, we have developed a kind of single-layer graphene-based surface plasmon resonance (SLG-SPR) biosensor to detect C-reactive protein (CRP) and Prostate-specific antigen (PSA). In the experiment of testing CPR, the results obtained revealed that the changes in resonance wavelength of SLG-SPR biosensors are higher than that of the gold-film based SPR (Au-SPR) biosensors. Moreover, for the experiment of testing PSA, due to the dynamic evanescent field enhancement produced by a strong electric field coupling between the localized SPR (LSPR) of AuNPs and SPR of single-layer graphene-based film (SLG-film) that further amplify the evanescent field signal. We verified the SLG-SPR biosensors exhibited higher sensitivity than the Au-SPR biosensors and the SLG-SPR biosensor exceeded the traditional biosensor detection limit. Accordingly, the SLG-SPR biosensor based on dynamic optical enhancement can realize high sensitivity detection of low concentration biomarkers and can be applied to most of the trace biomarkers in theory.
研究领域:
生物传感技术
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医学检测
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纳米材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Minxin Cui,Yiwei Zhuang,Gang Zou,Bing Zhu,Qijin Zhang
In this work, evanescent field initiated “click” polymerization on the surface of the waveguide is used to fabricate composite optical fiber taper probe for sensing. This improvement can effectively keep the polymerization within the scale of evanescent field on the surface of the fiber taper and prevent it in the precursor solution. Besides, for special sensing requirements, such as sensing target and sensitivity, this novel approach (photo-plating) is convenient to choose ingredients composed of the precursor solution in fabrication of a corresponding composite fiber taper probe. The photo-plating process usually completes within 30 s in specific precursor solution. As an example, a probe with a fluorescent polymer film composed of meso-tetrakis(4-allyloxyphenyl) porphyrin (TAOP) was made, which provides the binding sites for the nitro-based explosive molecules. The results indicate that the probe exhibits a good sensitivity and repeatability to trinitrotoluene (TNT), providing a fiber probe platform with miniaturization, real-time and remote monitoring for the detection of TNT vapor.
研究领域:
光学工程
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材料科学
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传感技术
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化学传感
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2023
·
IF 4.7
Xiaoguang Gao,Lingyu Li,Rong Deng,Wenjuan Zhao,Xiaoliang Zhang,Zhibo Liu
Quantitative detection of disease markers at ultralow concentrations has rigorous requirements on the performance of graphene-based optical sensors (GOSs). In this work, a localized surface plasmon resonance-modulated GOS was developed by uniformly dispersing gold nanorods (AuNRs) on the graphene surface. As an optical sensor based on refractive index sensing, the refractive index resolution and sensitivity of the optical sensor reached 2.34 × 10–9 and 2.14 × 107 mV/RIU, respectively. The sensitivity of the optical sensor toward IgG immunoassay reached 6.5 mV (μg mL–1)−1, a value 7-fold that without the AuNRs. A limit of detection of 1.22 ng/mL toward IgG immunoassay was obtained, a value one-tenth that without the AuNRs. Most critically, it has been demonstrated that the improved performance of the optical sensor was attributed to the enhanced evanescent field on graphene caused by the coupling of the evanescent field and LSRR of AuNRs. The proposed optical sensor in this study has the characteristics of high sensitivity, being label-free, and a simple preparation process. The successful application of the proposed sensor will also greatly promote the development of quantitative detection of disease markers at ultralow concentrations.
研究领域:
光学传感
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纳米技术
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生物传感器
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）