Open AccessUltrafast freestanding microfiber humidity sensor based on three-dimensional graphene network cladding
Author(s) -
Yi Zhong,
Yanzhen Wang,
Zhaoqun Wang,
Zengshan Xing,
Yi Xiao,
Jianhui Yu,
Heyuan Guan,
Yunhan Luo,
Huihui Lu,
Zhe Chen
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.379812
Subject(s) - microfiber , materials science , cladding (metalworking) , relative humidity , humidity , graphene , optical fiber , porosity , coating , fiber optic sensor , ultrashort pulse , optics , optoelectronics , fiber , nanotechnology , composite material , laser , physics , thermodynamics
An all-fiber humidity sensor is proposed and fabricated by depositing three-dimensional graphene network (3DGN) around the surface of a freestanding microfiber (MF). The high specific surface area and porosity of 3DGN enhances its interaction with water molecules, allowing high performance of the humidity sensor. The sensor can operate in a wide relative humidity (RH) range of 11.6%RH-90.9%RH with a high sensitivity of -2.841 dB/%RH in the RH range (80.3%RH - 90.9%RH). The response and recovery times of this type of microfiber sensor are measured respectively to be 57 ms and 55 ms, which are one order magnitude faster than those of other fiber RH sensors activated by two-dimensional materials coating. Such an all-fiber RH sensor with high sensitivity and fast response property possesses great potential of application in widespread fields, such as biology, chemical processing and food processing.