Journal
NANO RESEARCH
Volume -, Issue -, Pages -Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4917-y
Keywords
humidity sensors; nanomaterials; wearable humidity sensors; self-powered humidity sensors; human respiratory monitoring
Categories
Funding
- National Natural Science Foundation of China [51777215]
- Original Innovation Special Project of Science and Technology Plan of Qingdao West Coast New Area [2020-85]
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Humidity sensors are important in various fields. This paper summarizes diversiform humidity sensors with different sensing mechanisms and versatile nanomaterials for constructing humidity sensors. The latest progress in wearable and flexible humidity sensors and self-powered humidity sensors is summarized, and the diverse applications of humidity sensors in fields such as human health care and non-contact switches are demonstrated. The challenges and prospects of nanomaterials-based humidity sensors are also discussed.
Humidity sensors are of significance in various fields, such as environmental and food quality monitoring, industrial processing, wearable and flexible electronics, and human health care. High-performance humidity sensors with high sensitivity, rapid response time, and good stability are of paramount importance in humidity sensing. In this paper, diversiform humidity sensors with different sensing mechanisms are summarized, including resistive, impedance, capacitive, quartz crystal microbalance (QCM), surface acoustic wave (SAW), field-effect transistor (FET), and optical fiber humidity sensors. Versatile nanomaterials such as graphene, transition-metal chalcogenide, MXenes, black phosphorus (BP), boron nitride (BN), polymers, and nanofibers were promising building-blocks for constructing humidity sensors. The latest progress in the wearable and flexible humidity sensors, and self-powered humidity sensors was summarized. The diversiform applications of the humidity sensors with great prospects were demonstrated in various fields in terms of human respiratory monitoring, skin dryness diagnosing, fingertip approaching, and non-contact switch. Moreover, the challenges and prospects of nanomaterials-based humidity sensors were discussed.
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