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    Carbon-nanotube / Polyvinyl alcohol coated thin core fiber sensor for humidity measurement

    Year: 2018

    Journal: Sens. Actuator B-Chem., Volume 257, MAR, page 800–806

    Authors: Ma, Qi Fei; Tou, Zhi Qiang; Ni, Kai; Lim, Yong Yong; Lin, Yun Feng; Wang, Yan Ru; Zhou, Meng Hui; Shi, Fei Fei; Niu, Luo; Dong, Xin Yong; Chan, Chi Chiu

    Organizations: Natural Science Foundation of Zhejiang Province China [LY13F050004]; National Science Foundation of China [11404310]; Energy Market Authority(LA) [NRF2013EWTEIRP001-006]

    Keywords: Humidity sensor; Optical fiber; Michelson interferometer; Carbon-nanotube

    A Carbon-nanotube (CNT)/Polyvinyl alcohol (PVA) composite film-coated thin core fiber (TCF) optics sensor is proposed for monitoring relative humidity (RH). The unique Michelson type fiber interferometer sensor consists a short segment of TCF, the tip of which is melted into a convex shape and coated with a hydroscopic CNT/PVA film. The proposed sensor is linearly responsive to relative humidity (RH) beyond the humidity range 70% RH, with maximum sensitivity of -0.4573 dB/%RH. The advantages of this sensor are its compact size, excellent stability and facile fabrication process. (c) 2017 Elsevier B.V. All rights reserved.
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