Highly sensitive humidity sensors based on hexagonal boron nitride nanosheets for contactless sensing  

作　　者：Hang Liu Jinxu Qin Xigui Yang Chaofan Lv Wentao Huang Fukui Li Chuang Zhang Yanran Wu Lin Dong Chongxin Shan 

机构地区：[1]Henan Key Laboratory of Diamond Optoelectronic Materials and Devices,Key Laboratory of Materials Physics,Ministry of Education,School of Physics&Microelectronics,Zhengzhou University,Zhengzhou 450052,China [2]Institute of Quantum materials and Physics,Henan Academy of Sciences,Zhengzhou 450046,China

出　　处：《Nano Research》2023年第7期10279-10286,共8页纳米研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.12174348,U21A2070,and 62027816);the Young Elite Scientists Sponsorship Program by CAST(No.2021QNRC001);the Natural Science Foundation of Henan Province(No.212300410410);the China Postdoctoral Science Foundation(Nos.2018M630830 and 2019T120631).

摘　　要：Humidity sensors with high sensitivity,rapid response,and facile fabrication process for contactless sensing applications have received considerable attention in recent years.Herein,humidity sensors based on hexagonal boron nitride(h-BN)nanosheets that are synthesized by a facile ultrasonic process have been fabricated,which display an ultrahigh sensitivity of 28,384%at 85%relative humidity(RH),rapid response/recovery time(3.0/5.5 s),and long-term stability in a wide humidity detection range(11%-85%RH),superior to most of the reported humidity sensors.The high sensitivity can be ascribed to the massive hydrophilic functional groups absorbed on the h-BN nanosheet surface.Benefiting from the high humidity sensing performances,contactless Morse code messaging and human writing and speech recognition have been demonstrated.This work demonstrates the great potential of the high-performance h-BN nanosheet-based humidity sensors for future contactless sensing devices.

关 键 词：boron nitride humidity sensors contactless detection speech recognition 

分 类 号：TB383[一般工业技术—材料科学与工程]