Surface modification of polysquaraines to sense humidity within a second for breath monitoring

• Published in: Sensors and actuators. B, Chemical Vol. 271; pp. 137 - 146
• Main Authors: Zhou, Jin, Xiao, Xin, Cheng, Xue-Feng, Gao, Bi-Jun, He, Jing-Hui, Xu, Qing-Feng, Li, Hua, Li, Na-Jun, Chen, Dong-Yun, Lu, Jian-Mei
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.10.2018; Elsevier Science Ltd
• Subjects: Breath monitoring; Gold; Humidity; Humidity measurement; Humidity sensor; Hydrophobic surfaces; Impedance; Impedance model; Microspheres; Monitoring systems; Nanoparticles; Polysquaraine; Portable equipment; Recovery time; Relative humidity; Remote monitoring; Resonance-stabilized zwitterionic; Sensors; Surface chemistry; Surfactants; Weight; Humidity sensor; Impedance model; Resonance-stabilized zwitterionic; Polysquaraine; Breath monitoring

•A novel humidity sensor based on polysquraine microspheres doped by gold nanoparticles has been prepared.•The optimized humidity sensor is of a response/recovery time as short as 1/4 s, a hysteresis less than 5% and impedance variation >105.•A prototype portable machine are manufactured to demon...