Colorimetric sensing of chloride in sweat based on fluorescence wavelength shift via halide exchange of CsPbBr3 perovskite nanocrystals.
Mikrochim Acta
; 188(1): 2, 2021 01 02.
Article
in En
| MEDLINE
| ID: mdl-33387052
ABSTRACT
Considering the high importance of the rapid detection of chloride ion (Cl-) in sweat for the diagnosis of fibrotic cysts, we have investigated the heterogeneous halide exchange between CsPbBr3 perovskite nanocrystals (PNCs) in n-hexane and Cl- in aqueous solution. The results show that CsPbBr3 PNCs could achieve fast halide exchange with Cl- in the aqueous phase under magnetic stirring at pH = 1, accompanied by a significant wavelength blue shift and vivid fluorescence color changes from green to blue. Therefore, a fluorescence wavelength shift-based colorimetric sensing of Cl- based on the halide exchange of CsPbBr3 PNCs has been developed to realize the rapid detection of Cl- in sweat. Compared with the conventional fluorescence intensity-based method, this method is of high convenience since the whole procedure could be achieved within 5 min without any sample pretreatment (even no dilution), demonstrating promising application prospects. Graphical Abstract Fluorescence wavelength-shift based colorimetric sensing of chloride in sweat via halide exchange of CsPbBr3 perovskite nanocrystals.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sweat
/
Chlorides
/
Nanoparticles
/
Fluorescent Dyes
Limits:
Humans
Language:
En
Journal:
Mikrochim Acta
Year:
2021
Type:
Article