Optical Fiber Humidity Sensor with C60-THAM as Molecule Receptors
Optical Fiber Humidity Sensor with C60-THAM as Molecule Receptors
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DOI：
10.1016/j.snb.2022.132344
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
Xingshun Wu;F. Gao;Fei Jin;D.N. Wang;Y. Wang;Qi Chen;Hua Yang;H. Gong;Zhaokun Wang;Chunliu Zhao;Huan Liu
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文献类型：
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作者：
Xingshun Wu;F. Gao;Fei Jin;D.N. Wang;Y. Wang;Qi Chen;Hua Yang;H. Gong;Zhaokun Wang;Chunliu Zhao;Huan Liu
本研究提出了一种高灵敏度的光纤相对湿度传感器。此外，还合成了富勒烯衍生物C60-THAM，并首次报道它是OFHS中的分子受体。与OFHS中被广泛研究的碳基材料相比，C60-THAM膜具有丰富的氨基悬挂键，因此自然成为水分子的良好受体。此外，利用飞秒激光在单模光纤(SMF)芯部制作了无表面损伤的级联法布里-珀罗涉仪(FPI)。在OFHS中，相对湿度(RH)是通过游标效应测量的。通过计算和仿真分析了OFHS的工作原理。在实验中，将C60-THAM涂覆在植物纤维末端。当相对湿度从30%变化到65%时，传感器的灵敏度约为0.42 nm/RH，而光学物质的反应长度仅为150 nm左右。此外，当RH从65%下降到30%时，传感器表现出稳定的性能。这项工作中的OFHS是快速响应的，对上升和衰退过程的响应时间分别约为2.2%S和3.2%S。
This study proposed a high sensitivity optical fiber relative humidity sensor (OFHS). Besides, a fullerene derivative, C60-THAM, was synthesized and firstly reported as a molecule receptor in the OFHS. Compared with the widely researched carbon-based materials in OFHS, the C60-THAM film has abundant amino dangling bonds, hence emerges naturally as excellent receptors for water molecules. Besides, a cascaded Fabry-Perot interferometer (FPI) was fabricated in the core of single-mode fiber (SMF) without surface damage by femtosecond laser. In the OFHS, the relative humidity (RH) was measured by the Vernier effect. The working principle of the OFHS was analyzed through calculation and simulation. In the experiment, C60-THAM was coated on the plant fiber end. The sensitivity of the sensor is about 0.42 nm/RH as the relative humidity change from 30 % to 65 % while the optical-matter reaction length is only about 150 nm. Moreover, the sensor exhibited a stable performance as the RH was decreasing from 65 % to 30 %. The OFHS in this work is fast response and the response time for the rising and decay process was about 2.2 s and 3.2 s respectively.