AUTHOR=Guo Pan , Cui Danting , Dai Qiaofeng , Cheng Hongdao , Yu Jianhui , Guan Heyuan , Luo Yunhan , Lu Huihui , Xiao Yi , Zhong Yongchun , Zhu Wenguo , Chen Zhe 

TITLE=Ultrafast Microfiber Humidity Sensor Based on Three Dimensional Molybdenum Disulfide Network Cladding

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.863344

DOI=10.3389/fphy.2022.863344

ISSN=2296-424X

ABSTRACT=<p>We demonstrate an ultrafast humidity micro-fiber sensor based on molybdenum disulfide (MoS<sub>2</sub>) cladding with three dimensional network structure. The high surface-to-volume rations and porous mesh structure improve the interaction of between MoS<sub>2</sub> and water molecules, further enhancing the performance of the humidity sensor. The results demonstrated that the sensor can perform in a wide relative humidity (RH) range between 10%RH to 90%RH with rapid dynamic behavior (response and recovery time are 0.090 and 0.130 s respectively). The sum of response and recovery time (total time) is 0.220 s, which is the fastest in the reported MoS<sub>2</sub>-based humidity sensors. The sensitivity of this sensor is up to -1.501 dB/%RH in the RH range (77%RH–90%RH). Such a high performance RH sensor will have a wide range of application potential in chemical processing, various medical diagnostics, and so on.</p>