Localised plasmonic hybridisation mode optical fibre sensing of relative humidity.
Localised plasmonic hybridisation mode optical fibre sensing of relative humidity.
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DOI：
10.1016/j.snb.2021.131157
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发表时间：
2022-02-15
期刊：
影响因子：
--
通讯作者：
Morgan SP
中科院分区：
文献类型：
--
作者：
Liu L;Korposh S;Gomez D;Correia R;Hayes-Gill BR;Morgan SP
这项工作报告了一个光纤探头功能化与“棉花形”的金-二氧化硅纳米结构的相对湿度（RH）监测。传感器响应利用自组装纳米结构的局部表面等离子体共振（LSPR）：通过反射光的波长偏移在光纤的端面上由一层聚（烯丙胺盐酸盐）和亲水性二氧化硅纳米颗粒（10 - 20 nm）包围的金纳米球（40 nm）。传感器的优化研究通过改变密度的金纳米粒子的光纤端面上。它表明，当平均金粒子间距离小（中位数：7.5 nm）时出现的等离子体杂交模式是更敏感的RH功能化后，比单一的等离子体模式。等离子体杂交模式传感器表现出对RH的高度线性回归，灵敏度为0.63 nm/% RH，并且具有优异的可逆性。响应时间（T10 - 90%）和恢复时间（T90 - 10%）计算为1.2 ± 0.4 s和0.95 ± 0.18 s。该传感器在25 ° C至40 ° C的测试范围内没有可测量的温度串扰，与商业参考传感器相比，95%的一致性限值为3.1%RH。有限元分析的模拟揭示了偏振相关的等离子体杂化与红移的等离子体波长的粒子间的距离和更高的折射率灵敏度的减少，这导致在实验中观察到的RH的高灵敏度。基于等离子体杂化模式的高灵敏度光纤LSPR传感器。用于RH传感的光纤端面上的"棉花形"金属-电介质纳米结构。95% Bland-Altman一致性限为3.1%RH。出色的稳定性和可靠性，适用于不同日期的RH传感。
This work reports an optical fibre probe functionalised with ‘cotton-shaped’ gold-silica nanostructures for relative humidity (RH) monitoring. The sensor response utilises the localised surface plasmon resonance (LSPR) of self-assembled nanostructures: gold nanospheres (40 nm) surrounded by one layer of poly (allylamine hydrochloride) and hydrophilic silica nanoparticles (10–20 nm) on the end-facet of an optical fibre via a wavelength shift of the reflected light. Sensor optimisation is investigated by varying the density of gold nanoparticles on the end-facet of an optical fibre. It is demonstrated that the plasmonic hybridisation mode appearing when the average gold interparticle distance is small (Median: 7.5 nm) is more sensitive to RH after functionalisation than the singular plasmonic mode. The plasmonic hybridisation mode sensor demonstrates a high linear regression to RH with a sensitivity of 0.63 nm/%RH and excellent reversibility. The response time (T10–90%) and recovery time (T90–10%) are calculated as 1.2 ± 0.4 s and 0.95 ± 0.18 s. The sensor shows no measurable cross-talk to temperature in the tested range between 25 °C to 40 °C and the 95% limit of agreement is 3.1%RH when compared to a commercial reference sensor. Simulation with finite element analysis reveals a polarisation-dependent plasmonic hybridisation with a redshift of plasmonic wavelength as a decrease of the interparticle distance and a higher refractive index sensitivity, which results in a high sensitivity to RH as observed in the experiment. Highly sensitive fibre optic LSPR sensor for measurement of RH based on plasmonic hybridisation mode. ‘Cotton-shaped’ metal-dielectric nanostructures on the end-facet of an optical fibre for RH sensing. 95% Bland-Altman limit of agreement is 3.1%RH. Excellent stability and reliability for RH sensing over different days.
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DOI：
10.3390/s21041420
发表时间：
2021-02-18
期刊：
Sensors (Basel, Switzerland)
影响因子：
--
作者：
He C;Liu L;Korposh S;Correia R;Morgan SP
通讯作者：
Morgan SP
影响因子：
8.4
作者：
Rivero, Pedro J.;Urrutia, A.;Arregui, F. J.
通讯作者：
Arregui, F. J.
影响因子：
10.8
作者：
Jain, Prashant K.;Huang, Wenyu;El-Sayed, Mostafa A.
通讯作者：
El-Sayed, Mostafa A.
影响因子：
2.9
作者：
Schultz, G;Mozingo, D;Claxton, K
通讯作者：
Claxton, K
影响因子：
3.8
作者：
Lin, Hsing-Ying;Huang, Chen-Han;Chui, Hsiang-Chen
通讯作者：
Chui, Hsiang-Chen