A skin-conformal and breathable humidity sensor for emotional mode recognition and non-contact human-machine interface

Noncontact humidity sensor overcomes the limitations of its contact sensing counterparts, including mechanical wear and cross infection, which becomes a promising candidate in healthcare and human-machine interface application. However, current humidity sensors still suffer the ubiquitous issue of u...

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Bibliographic Details
Published in:Npj flexible electronics 2024-01, Vol.8 (1), p.3-9, Article 3
Main Authors: Li, Tongkuai, Zhao, Tingting, Zhang, Hao, Yuan, Li, Cheng, Congcong, Dai, Junshuai, Xue, Longwei, Zhou, Jixing, Liu, Hai, Yin, Luqiao, Zhang, Jianhua
Format: Article
Language:English
Subjects:
639/166/987
639/925/927/511
Biocompatibility
Chemistry and Materials Science
Elastomers
Electrodes
Electronics and Microelectronics
Functional materials
Humidity
Hydroxyl groups
Instrumentation
Irritation
Man-machine interfaces
Materials Science
Nanofibers
Optical and Electronic Materials
Polymer Sciences
Recognition
Sensors
Substrates
Water chemistry
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Summary:Noncontact humidity sensor overcomes the limitations of its contact sensing counterparts, including mechanical wear and cross infection, which becomes a promising candidate in healthcare and human-machine interface application. However, current humidity sensors still suffer the ubiquitous issue of uncomfortable wear and skin irritation hindering the long-term use. In this study, we report a skin-conformal and breathable humidity sensor assembled by anchoring MXenes-based composite into electrospun elastomer nanofibers coated with a patterned electrode. This composite is highly sensitive to the water molecules due to its large specific surface area and abundant water-absorbing hydroxyl groups, while the elastomeric nanofibers provide an ultrathin, highly flexible, and permeable substrate to support the functional materials and electrodes. This sensor presents not only excellent air permeability (0.078 g cm −2 d −1 ), high sensitivity ( S  = 704), and fast response/recovery (0.9 s/0.9 s), but also high skin conformability and biocompatibility. Furthermore, this humidity sensor is confirmed to realize the recognition of motional states and emotional modes, which provides a way for the advanced noncontact human-machine interface.
ISSN:2397-4621
2397-4621
DOI:10.1038/s41528-023-00290-z