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Ultrafast‐Response Humidity Sensor with High Humidity Durability Based on a Freestanding Film of Graphene Oxide Supramolecular
Author(s) -
Tang Min,
Zhang Chen,
Zhang Jun-Ying,
Zhao Quan-Liang,
Hou Zhi-Ling,
Zhan Ke-Tao
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900869
Subject(s) - humidity , materials science , graphene , oxide , ultrashort pulse , water vapor , adsorption , desorption , chemical engineering , nanotechnology , composite material , organic chemistry , optics , chemistry , laser , physics , engineering , metallurgy , thermodynamics
Humidity sensors with ultrafast response and recovery speed are highly desired in applications of dynamic situations, such as medical monitoring and industrial detection. A freestanding film for humidity sensing with ultrafast response is easily fabricated by supramolecular polymerization of graphene oxide and aniline (GOA). Its response/recovery time is as short as about 50 ms. The high‐speed adsorption and desorption of water vapor on the surface of GOA benefit from the unique moderate hydrophobic surface caused by the hydrophilicity of the oxygen‐containing functional group and the hydrophobicity of the benzene ring. Furthermore, the GOA sensor can work at high humidity and recover rapidly from full‐water condition. Such ultrafast response and excellent water‐durable property of GOA film facilitate the application for physiological or psychological monitoring by detecting humidity fluctuations of human body in real time.