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Boron/MXene Hollow Spheres for Humidity Sensing and Respiration Monitoring.
- Source :
- ACS Applied Nano Materials; 5/10/2024, Vol. 7 Issue 9, p10797-10804, 8p
- Publication Year :
- 2024
-
Abstract
- Boron nanosheets with high surface hydrophilicity and proton conductivity are promising for ionic devices. However, their poor electrical conductivity has severely limited their applications in resistive-type electronic devices. Herein, electrically conductive three-dimensional boron/MXene hollow spheres were prepared by a freeze-drying-assisted self-assembly method. The composites were fabricated into resistive-type humidity sensors, which showed high sensitivity with a three-orders-of-magnitude variation in resistance, a wide detection range (11–97%), fast response and recovery time (4 s/3.8 s), and long-term stability. The excellent humidity sensing performance can be attributed to the abundant hydrophilic groups on both the inner and outer surfaces of open spheres as well as to a coupled hole/proton conducting process. As a proof of concept, real-time remote monitoring of human respiration was achieved by integrating our humidity sensor with a Bluetooth module, enabling differentiation of breathing frequency as rapid as 0.8 s. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 25740970
- Volume :
- 7
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- ACS Applied Nano Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177226638
- Full Text :
- https://doi.org/10.1021/acsanm.4c01301