Details

Autor(en) / Beteiligte

• Li, Shuo
• Zhang, Yong
• Liang, Xiaoping
• Wang, Haomin
• Lu, Haojie
• Zhu, Mengjia
• Wang, Huimin
• Zhang, Mingchao
• Qiu, Xinping
• Song, Yafeng
• Zhang, Yingying

Titel

Humidity-sensitive chemoelectric flexible sensors based on metal-air redox reaction for health management

Ist Teil von

• Nature communications, 2022-09, Vol.13 (1), p.5416-5416, Article 5416

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Abstract Numerous studies have shown flexible electronics play important roles in health management. The way of power supply is always an essential factor of devices and self-powered ones are very attractive because of the fabrication easiness, usage comfort and aesthetics of the system. In this work, based on the metal-air redox reaction, which is usually used in designing metal-air batteries, we design a self-powered chemoelectric humidity sensor where a silk fibroin (SF) and LiBr gel matrix containing parallel aligned graphene oxide (GO) flakes serve as the electrolyte. The abundant hydrophilic groups in GO/SF and the hygroscopicity of LiBr lead to tight dependence of the output current on the humidity, enabling the sensor high sensitivity (0.09 μA/s/1%), fast response (1.05 s) and quick recovery (0.80 s). As proofs of concept, we design an all-in-one respiratory monitoring-diagnosing-treatment system and a non-contact human-machine interface, demonstrating the applications of the chemoelectric humidity sensor in health management.