Wearable humidity sensor based on porous graphene network for respiration monitoring

Respiration is as one of the most essential physiological signals, which can be used to monitor human healthcare and activities. Herein, we report a flexible, lightweight and highly conductive porous graphene network as the humidity sensor for respiration monitoring. To enhance the sensing performan...

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Bibliographic Details
Published in:Biosensors & bioelectronics 2018-09, Vol.116, p.123-129
Main Authors: Pang, Yu, Jian, Jinming, Tu, Tao, Yang, Zhen, Ling, Jiang, Li, Yuxing, Wang, Xuefeng, Qiao, Yancong, Tian, He, Yang, Yi, Ren, Tian-Ling
Format: Article
Language:English
Subjects:
Biosensing Techniques - instrumentation
Bridged Bicyclo Compounds, Heterocyclic - chemistry
Graphene
Graphite - chemistry
Humans
Humidity
Humidity sensor
Monitoring, Physiologic - instrumentation
Polymers - chemistry
Polystyrenes - chemistry
Porosity
Porous network
Respiration
Respiration monitoring
Silver - chemistry
Surface modification
Wearable Electronic Devices
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Summary:Respiration is as one of the most essential physiological signals, which can be used to monitor human healthcare and activities. Herein, we report a flexible, lightweight and highly conductive porous graphene network as the humidity sensor for respiration monitoring. To enhance the sensing performance, the graphene oxide (GO), poly (3, 4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT: PSS) and Ag colloids (AC) were used to modify the porous graphene. The humidity properties of porous based graphene networks have been investigated at different relative humidity (RH). The porous based graphene sensors exhibit excellent capability of monitoring different breathing patterns including mouse and nose respiration, normal and deep respiration. Besides, the signal variations before and after water intake was recorded by the sensor, which demonstrates the ability to monitor water loss during breathing period. Furthermore, the humidity sensor shows the ability to detect physiological activities including skin moisture, speaking and whistle rhythm, which could be a promising electronic for clinical respiration monitoring. •A novel porous graphene network was first fabricated as humidity sensor.•Surface modification has been developed to improve the humidity sensing performance.•The respiration monitoring of porous graphene based humidity sensor has been systematically demonstrated.
ISSN:0956-5663
1873-4235
DOI:10.1016/j.bios.2018.05.038