Journal
DYES AND PIGMENTS
Volume 168, Issue -, Pages 180-188Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.04.065
Keywords
Graphitic carbon nitride; Multi-chemical sensor; 3-Aminophenylboronic acid; Glucose sensor; Fluorescence; Quantum dots
Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [NRF-2016R1A2B2006311]
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This paper reports a highly sensitive photoluminescence glucose sensor based on aminoboronic acid-functionalized carbon nitride quantum dots (g-CNQDs/3APBA) fabricated using melamine and 3-aminophenylboronic acid via a facile two-step synthesis process. By introducing the covalent bonds between g-CNQDs and boronic acid groups, it can be effectively used as on-off-on based multi-chemical sensor. The g-CNQDs/3APBA exhibited quantum yields (QYs) as high as 78.5%, which is the highest QYs among fluorescence sensors based on g-CNQDs reported thus far. The material showed a wide linear range of 0-10 mM and a detection limit as low as 42 nM with excellent selectivity. In addition, it exhibited comparable performance compared to those of a commercial glucometer in a real blood test. Owing to the excellent bio-imaging properties and low cytotoxicity, g-CNQDs/3APBA is a promising candidate as a sensing material for biomedical and clinical applications.
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