Sensitive humidity sensor based on moisture-driven energy generation  

作　　者：Qingchao Ni Qing Lou Chenglong Shen Guangsong Zheng Runwei Song Jingnan Hao Jialu Liu Jinyang Zhu Jinhao Zang Lin Dong Chong-Xin Shan 

机构地区：[1]Henan Key Laboratory of Diamond Optoelectronic Materials and Devices,Key Laboratory of Materials Physics,Ministry of Education,and School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China [2]State Centre for International Cooperation on Designer Low-Carbon&Environmental Materials,and School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Nano Research》2024年第6期5578-5586,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.12261141661,12074348,U2004168,U21A2070,62027816,and 12004345);the Natural Science Foundation of Henan Province(No.212300410078).

摘　　要：The emergence of novel self-powered humidity sensors has attracted considerable attention in the fields of smart electronic devices and personal healthcare.Herein,self-powered humidity sensors have been fabricated using a moisture-driven energy generation(MEG)device based on asymmetric tubular graphitic carbon nitride(g-CN)films prepared on anodized aluminum(AAO)template.At a relative humidity(RH)of 96%,the MEG device can provide an open-circuit voltage of 0.47 V and a short-circuit current of 3.51μA,with a maximum output power of 0.08μW.With inherent self-powered ability and humidity response via current variation,an extraordinary response of 1.78×106%(41%-96%RH)can be gained from the MEG device.The possible power generation mechanism is that g-CN/AAO heterostructure can form ion gradient and diffusion under the action of moisture to convert chemical potential into electrical potential,evoking a connaturally sensitive response to humidity.Self-powered respiration monitoring device based on the sensor is designed to monitor human movement(sitting,warming up,and running)and sleep status(normal,snoring,and apnea),maintaining excellent stability during cumulative 12-h respiration monitoring.This self-powered humidity sensing technology has promising potential for extensive integration into smart electronic and round-the-clock health monitoring devices.

关 键 词：graphitic carbon nitride moisture-driven energy generation humidity sensor respiration monitoring 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]