Journal
SMALL
Volume 15, Issue 38, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201902801
Keywords
human-machine interaction; humidity sensors; MoO3; noncontact
Categories
Funding
- National Natural Science Foundation of China [61625404, 61888102]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JWC004]
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The development of noncontact humidity sensors with high sensitivity, rapid response, and a facile fabrication process is urgently desired for advanced noncontact human-machine interaction (HMI) applications. Here, a flexible and transparent humidity sensor based on MoO3 nanosheets is developed with a low-cost and easily manufactured process. The designed humidity sensor exhibits ultrahigh sensitivity, fast response, great stability, and high selectivity, exceeding the state-of-the-art humidity sensors. Furthermore, a wearable moisture analysis system is assembled for real-time monitoring of ambient humidity and human breathing states. Benefiting from the sensitive and rapid response to fingertip humidity, the sensors are successfully applied to both a smart noncontact multistage switch and a novel flexible transparent noncontact screen for smart mobile devices, demonstrating the potential of the MoO3 nanosheets-based humidity sensors in future HMI systems.
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