Multifunctional wearable humidity and pressure sensors based on biocompatible graphene/bacterial cellulose bioaerogel for wireless monitoring and early warning of sleep apnea syndrome. (April 2023)

• Record Type: Journal Article
• Authors: Sun, Jingyao; Xiu, Kunhao; Wang, Ziying; Hu, Ning; Zhao, Libin; Zhu, Hao; Kong, Fanzhong; Xiao, Jianliang; Cheng, Lijin; Bi, Xiaoyang
• Is Part Of: Nano energy. Volume 108(2023)
• Publication Date: 2023-04
• Subjects: Biocompatibility -- Flexible pressure and humidity sensor -- Physiological signal monitoring -- Wireless respiration monitoring and decoding -- Sleeping quality monitoring; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2023.108215
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Real time monitoring of respiratory status during sleep is essential to provide immediate feedback for people with sleep apnea syndrome (SAS). Conventional strategies to monitor sleeping status rely on polysomnography or inflexible chip sensors. However, the devices used in these methods have poor wearability and comfort and are inconvenient to operate. Here, we report a multifunctional, integrated and low-power wireless flexible sensing platform based on biocompatible bacterial cellulose (BC) and graphene hybrids, which can be used not only for monitoring physiological signals and respiration, but also for Morse-code-based wireless communication. Combining the excellent conductivity of graphene and the high mechanical properties of BC, 3D porous Graphene/BC bioaerogel exhibits outstanding pressure sensing properties with a wide operating range (20 pa to 30 kPa), high sensitivity and cycling stability. Moreover, graphene oxide (GO)/BC exhibits excellent humidity sensing performance and realizes real-time monitoring of respiratory waveform and frequency. Finally, wear wireless flexible pressure and humidity sensors for extended periods of time during sleep can provide simultaneously diagnostic data for SAS. This original work shows that the wireless sensor system reported here has potential applicability in the field of medical science and military applications. Graphical Abstract: A multifunctional and integrated wireless flexible sensing platform, which can be used for monitoring physiological signals and respiration was reported. Morse code-based wireless communication and feedback alarm functionalities were used to track the sleeping status. The flexible pressure and humidity sensors were successfully fabricated based on a simple preparation process by combining ultrasonic mixing and freeze-drying. Graphene/BC and GO/BC were used as the pressure and humidity sensitive materials, respectively. ga1 Highlights: A multifunctional, integrated flexible sensing platform based on biocompatible graphene/BC can be used for monitoring physiological signals, respiration and Morse-code-based wireless communication. 3D porous Graphene/BC exhibits outstanding pressure sensing properties with a wide operating range (20 pa to 30 kPa). The flexible pressure and humidity sensors for extended periods of time during sleep can provide simultaneously diagnostic data for SAS.