Europium-modified carbon nitride nanosheets for smartphone-based fluorescence sensitive recognition of anthrax biomarker dipicolinic acid
2023
Yuan, Mi | Jin, Yu | Yu, Long | Bu, Yiming | Sun, Mingtai | Yuan, Chao | Wang, Suhua
Development of selective and sensitive methods for the detection of 2, 6-dipicolinic acid (DPA), a biomarker produced by bacterial spores, is of great significance for maintaining public health and food safety. Herein, a ratiometric fluorescence strategy using graphene carbon nitride (g-C₃N₄) coupled with Eu³⁺ is designed for the assay of DPA. As the concentration of DPA increases, the emission intensity of g-C₃N₄ kept constant which acted as a stable internal reference, while the fluorescence of Eu³⁺ was enhanced obviously due to the antenna effect. The linear calibration ranged from 0.1 to 15 μM with a detection limit of 13 nM was obtained. More Importantly, a paper-based sensor with a smartphone was successfully combined to perform colorimetric and visual detection of DPA in situ. This method has good performance for the detection of DPA, which is expected to broaden the application prospects of preliminary biomarker monitoring.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library