Humidity sensing properties and respiratory behavior detection based on chitosan-halloysite nanotubes film coated QCM sensor combined with support vector machine

This work demonstrated an accurate and reliable quartz crystal microbalance (QCM) humidity sensor based on the chitosan-halloysite nanotubes (CS-HNTs) composite that can be used to monitor respiration lines. The hydrophilic polymer chitosan (CS) with halloysite nanotubes (HNTs) was characterized usi...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2023-01, Vol.374, p.132824, Article 132824
Main Authors: Zhang, Dongzhi, Mao, Ruiyuan, Song, Xiaoshuang, Wang, Dongyue, Zhang, Hao, Xia, Hui, Ma, Yanhua, Gao, Yonghai
Format: Article
Language:English
Subjects:
Chemical bonds
Chitosan
Halloysite nanotubes
Humidity
Humidity sensor
Molecular structure
Nanotubes
Quartz crystal microbalance
Quartz crystals
Selectivity
Support vector machine
Support vector machines
X ray photoelectron spectroscopy
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Summary:This work demonstrated an accurate and reliable quartz crystal microbalance (QCM) humidity sensor based on the chitosan-halloysite nanotubes (CS-HNTs) composite that can be used to monitor respiration lines. The hydrophilic polymer chitosan (CS) with halloysite nanotubes (HNTs) was characterized using SEM, TEM, XRD, XPS, FT-IR, and WCA investigations to analyze the microscopic morphology, molecular structure, chemical bond, and hydrophilicity. The experimental results showed that the QCM humidity sensor of CS-HNTs film demonstrated high sensitivity (69.1 Hz/% RH), superior humidity hysteresis (
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2022.132824