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Macroporous perovskite nanocrystal composites for ultrasensitive copper ion detection
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Li, Hanchen, Yin, Wenping, Ng, Chun Kiu, Huang, Ruoxi, Du, Shengrong, Sharma, Manoj, Li, Bin, Yuan, Gangcheng, Michalska, Monika, Matta, Sri Kasi, Chen, Yu, Chandrasekaran, Naresh, Russo, Salvy, Cameron, Neil R., Funston, Alison M. and Jasieniak, Jacek J. (2022) Macroporous perovskite nanocrystal composites for ultrasensitive copper ion detection. Nanoscale, 14 (33). pp. 11953-11962. doi:10.1039/d2nr02737b ISSN 2040-3372.
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Official URL: https://doi.org/10.1039/d2nr02737b
Abstract
Accumulation of heavy metal ions, including copper ions (Cu2+), presents a serious threat to human health and to the environment. A substantial amount of research has focused on detecting such species in aqueous solutions. However, progress towards ultrasensitive and easy-to-use sensors for non-aqueous solutions is still limited. Here, we focus on the detection of copper species in hexane, realising ultra-sensitive detection through a fluorescence-based approach. To achieve this, a novel macroporous composite material has been developed featuring luminescent CsPbBr3 nanocrystals (NCs) chemically adhered to a polymerized high internal phase emulsion (polyHIPE) substrate through surface thiol groups. Due to this thiol functionality, sub-monolayer NC formation is realised, which also renders outstanding stability of the composite in the ambient environment. Copper detection is achieved through a direct solution based immersion of the CsPbBr3-(SH)polyHIPE composite, which results in concentration-dependent quenching of the NC photoluminescence. This newly developed sensor has a limit of detection (LOD) for copper as low as 1 × 10−16 M, and a wide operating window spanning 10−2 to 10−16 M. Moreover, the composite exhibits excellent selectivity among different transition metals.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Nanoscale | ||||||
Publisher: | Royal Society of Chemistry (RSC) | ||||||
ISSN: | 2040-3372 | ||||||
Official Date: | 28 July 2022 | ||||||
Dates: |
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Volume: | 14 | ||||||
Number: | 33 | ||||||
Page Range: | pp. 11953-11962 | ||||||
DOI: | 10.1039/d2nr02737b | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Reuse Statement (publisher, data, author rights): | ** Article version: AM ** From Crossref journal articles via Jisc Publications Router ** Licence for AM version of this article starting on 28-07-2023: http://rsc.li/journals-terms-of-use | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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