Polymeric optical fibre sensor coated by SiO2 nanoparticles for humidity sensing in the skin microenvironment
Polymeric optical fibre sensor coated by SiO2 nanoparticles for humidity sensing in the skin microenvironment
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DOI：
10.1016/j.snb.2017.07.191
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发表时间：
2018-01-01
影响因子：
8.4
通讯作者：
Korposh, Sergiy
中科院分区：
文献类型：
--
作者：
Gomez, David;Morgan, Stephen P.;Korposh, Sergiy
低成本的聚合物光纤湿度传感器的灵敏度的基础上的透射率的变化，由于倏逝波吸收的报告使用测试测量环境室和皮肤。使用逐层方法用7层由聚（烯丙胺盐酸盐）和SiO2介孔纳米颗粒的双层组成的亲水膜涂覆多模聚合物光纤的30 mm的中心无包层部分。传感器表征示出了随着相对湿度的增加，由于沉积在光纤上的涂层的折射率变化，光透射率降低，这与商业电容式湿度传感器相关。在-10%~-75% RH和90%~ 97% RH范围内，用最佳7层涂层的传感器获得的灵敏度分别为每相对湿度百分比的透射率百分比约为-3.87 × 10（-3）和-9.61 × 10（-3）。此外，对于使用聚合物光纤湿度传感器的呼吸监测，可以看到1.5s的响应时间。在皮肤上进行的概念验证测量表明，该传感器有可能用于监测伤口敷料内皮肤微环境的湿度，这可用于提供更好的愈合预后。(C)2017爱思唯尔B. V.保留所有权利。
The sensitivity of a low-cost polymeric optical fibre humidity sensor based on transmittance changes due to evanescent wave absorption is reported using test measurements in an environmental chamber and of the skin. The layer-by-layer method was used to coat 30 mm of the central unclad section of a multimode polymeric optical fibre with 7 layers of a hydrophilic film consisting of bilayers of poly(allylamine hydrochloride) and SiO2 mesoporous nanoparticles. Sensor characterisation shows a decrease in light transmission as relative humidity increases as a result of refractive index changes of the coating deposited onto the optical fibre which correlates with a commercial capacitive humidity sensor. The sensitivity obtained for the sensor coated with an optimum 7 layers was approximately -3.87 x 10(-3) and -9.61 x 10(-3) in transmittance percentage per RH percentage for the range of -10% to -75% RH and 90% to 97% RH, respectively. In addition, a response time of 1.5s can be seen for breath monitoring with the polymeric optical fibre humidity sensor. The proof of concept measurements made on the skin indicate that this sensor has the potential to be used to monitor humidity of the skin microenvironment within a wound dressing which can be used to provide better prognosis of healing. (C) 2017 Elsevier B.V. All rights reserved.