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Nanomaterials 2019, 9(3), 422; https://doi.org/10.3390/nano9030422

Recent Advances in Graphene-Based Humidity Sensors

1
Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
2
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
3
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
4
College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
*
Authors to whom correspondence should be addressed.
Received: 31 January 2019 / Revised: 1 March 2019 / Accepted: 3 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Electronic and Thermal Properties of Graphene)
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Abstract

Humidity sensors are a common, but important type of sensors in our daily life and industrial processing. Graphene and graphene-based materials have shown great potential for detecting humidity due to their ultrahigh specific surface areas, extremely high electron mobility at room temperature, and low electrical noise due to the quality of its crystal lattice and its very high electrical conductivity. However, there are still no specific reviews on the progresses of graphene-based humidity sensors. This review focuses on the recent advances in graphene-based humidity sensors, starting from an introduction on the preparation and properties of graphene materials and the sensing mechanisms of seven types of commonly studied graphene-based humidity sensors, and mainly summarizes the recent advances in the preparation and performance of humidity sensors based on pristine graphene, graphene oxide, reduced graphene oxide, graphene quantum dots, and a wide variety of graphene based composite materials, including chemical modification, polymer, metal, metal oxide, and other 2D materials. The remaining challenges along with future trends in high-performance graphene-based humidity sensors are also discussed. View Full-Text
Keywords: humidity sensors; graphene; graphene oxide; reduced graphene oxide; chemical modified graphene; graphene/polymer; graphene quantum dots; graphene/metal oxide; graphene/2D materials humidity sensors; graphene; graphene oxide; reduced graphene oxide; chemical modified graphene; graphene/polymer; graphene quantum dots; graphene/metal oxide; graphene/2D materials
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lv, C.; Hu, C.; Luo, J.; Liu, S.; Qiao, Y.; Zhang, Z.; Song, J.; Shi, Y.; Cai, J.; Watanabe, A. Recent Advances in Graphene-Based Humidity Sensors. Nanomaterials 2019, 9, 422.

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