Single stranded 1D-helical Cu coordination polymer for ultra-sensitive ammonia sensing at room temperature

Authors
Im, TaehunLee, JuyunKim, Sung-ChulRandrianandraina, JoharimanitraLee, Joo-WonChung, Myoung WonPark, TaesungLow, Kam-HungLee, SeungkyuOh, Soong JuKang, Yun ChanWeon, SeunghyunLee, Jung-HoonKim, Seon JoonJeong, Sohee
Issue Date
2024-10
Publisher
Royal Society of Chemistry
Citation
Materials Horizons, v.11, no.20, pp.4970 - 4978
Abstract
With the increasing demand for ammonia applications, there is a significant focus on improving NH3 detection performance at room temperature. In this study, we introduce a groundbreaking NH3 gas sensor based on Cu(i)-based coordination polymers, featuring semiconducting, single stranded 1D-helical nanowires constructed from Cu-Cl and N-methylthiourea (MTCP). The MTCP demonstrates an exceptional response to NH3 gas (>900% at 100 ppm) and superior selectivity at room temperature compared to current materials. The interaction mechanism between NH3 and the MTCP sensor is elucidated through a combination of empirical results and computational calculations, leveraging a crystal-determined structure. This reveals the formation of NH3-Cu and NH3-H3C complexes, indicative of a thermodynamically favorable reaction. Additionally, Ag-doped MTCP exhibits higher selectivity and a response over two times greater than the original MTCP, establishing it as a prominent NH3 detection system at room temperature.
Keywords
THIN-FILM; SULFIDE; SENSORS; FTIR; NH3; METAL-ORGANIC FRAMEWORK; ELECTRONIC-STRUCTURES
ISSN
2051-6347
URI
https://pubs.kist.re.kr/handle/201004/150372
DOI
10.1039/d4mh00651h
Appears in Collections:
KIST Article > 2024
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