Outstanding Humidity Chemiresistors Based on Imine-Linked Covalent Organic Framework Films for Human Respiration Monitoring

Autor:	Xiyu Chen, Lingwei Kong, Jaafar Abdul-Aziz Mehrez, Chao Fan, Wenjing Quan, Yongwei Zhang, Min Zeng, Jianhua Yang, Nantao Hu, Yanjie Su, Hao Wei, Zhi Yang
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	Covalent organic frameworks Humidity sensors Reversible tautomerism Non-invasive diagnosis Health monitoring Technology
Zdroj:	Nano-Micro Letters, Vol 15, Iss 1, Pp 1-16 (2023)
Druh dokumentu:	article
ISSN:	2311-6706 2150-5551
DOI:	10.1007/s40820-023-01107-4
Popis:	Highlights Imine groups in covalent organic framework (COF) films act as dual-active sites for humidity sensing, inducing an intrinsic enhanced mechanism of reversible protonated tautomerism via water molecule-induced hydrogen bonding. The cis-ketoimine reciprocal isomerization induces a stretching vibration effect for the ordered conjugated conductive frame of COF films, realizing fast response, wide range, and high sensitivity characteristics for humidity detection. Resistance changes of COF film-based sensors keep a strong linear relationship with low-range relative humidity, reflecting the quantitative sensing mechanism at the molecular level.
Databáze:	Directory of Open Access Journals
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