Humidity Mediated Dual Ionic Electronic Conductivity Enables High Sensitivity in MOF Chemiresistors
- Title
- Humidity Mediated Dual Ionic Electronic Conductivity Enables High Sensitivity in MOF Chemiresistors
- Author
- 김동하
- Keywords
- Electrical conductivity; Humidity; Metal organic frameworks; Proton conductivity; Sensors
- Issue Date
- 2024-07-10
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v. 146, no 29, page. 20213-20220
- Abstract
- In the presence of water, the electrically conductive metal–organic framework (MOF) Cu3HHTT2 (H6HHTT = 2,3,7,8,12,13-hexahydroxy-4b1,5,10,15-tetraazanaphtho[1,2,3-gh]tetraphene) provides a conduit for proton transport, thereby becoming a dual ionic–electronic conductor. Owing to its dual conducting nature and its high density of imine and open metal sites, the MOF operates as a particularly sensitive chemiresistor, whose sensing mechanism changes with relative humidity. Thus, the interaction of NH3 gas with the MOF under low humidity promotes proton transport, which translates to high sensitivity for ammonia detection. Conversely, NO2 gas hinders proton conductivity, even under high relative humidity conditions, leading to large resistance variations in the humid regime. This dual ionic–electronic conduction-based gas sensor provides superior sensitivity compared to other conventional chemiresistors under similar conditions and highlights its potential as a platform for room-temperature gas sensors.
- URI
- https://pubs.acs.org/doi/full/10.1021/jacs.4c05343https://repository.hanyang.ac.kr/handle/20.500.11754/191736
- ISSN
- 0002-7863; 1520-5126
- DOI
- https://doi.org/10.1021/jacs.4c05343
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
- Files in This Item:
- 2024.7_김동하_Humidity-Mediated Dual Ionic–Electronic Conductivity Enables High Sensitivity in MOF Chemiresistors.pdfDownload
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