Tuning of carbon dots emission color for sensing of Fe3+ ion and bioimaging applications

Materials Science & Engineering. C, Materials for Biological Applications
Suresh Kumar KailasaTae Jung Park

Abstract

Herein, we report a facile one-step synthetic strategy for fabrication of three (blue, green and yellow) fluorescent color carbon dots (CDs) from tomato (Solanum lycopersicum). The as-synthesized CDs showed emission peaks at 450, 520 and 560 nm for blue, green and yellow color CDs when excited at 370, 420 and 460 nm, respectively. Using tomato as a carbon source, the fabricated three fluorescent color CDs showed good water dispersity and high quantum yield. The analytical performances of three fluorescent color CDs are evaluated by detecting Fe3+ ion in biofluids and iron tablets. Upon the addition of Fe3+ ion under optimal conditions, the fluorescence intensity of three fluorescent color CDs was quenched linearly over the range of 0.1 to 2.0 μM. This method opens a new analytical strategy to quantify Fe3+ ion in iron tablets and biofluids with high sensitivity. Further, the uptake of three fluorescent color CDs into HeLa cells was confirmed by confocal laser scanning microscopy. Intracellular experiments demonstrated that the three fluorescent color CDs were effectively internalized the cells and show excellent biocompatibility and low toxicity, suggesting that the CDs can be used as good candidates for biomedical applications.

Citations

Jun 21, 2020·Biosensors·Muhammad ZulfajriGenin Gary Huang
Jun 17, 2020·Luminescence : the Journal of Biological and Chemical Luminescence·Congling WangWeilin Zhao
Feb 24, 2020·Journal of Fluorescence·Gaurav Gopal NaikAlakh N Sahu
Aug 5, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Souravi BardhanSukhen Das
Feb 17, 2021·Analytical Methods : Advancing Methods and Applications·Lijuan LiuYunlin Wei
Feb 23, 2020·Advances in Colloid and Interface Science·Milad AshrafizadehAbbas Pardakhty
Jun 12, 2021·Journal of Fluorescence·Nima Ambika MadhusoodananSubodh Ganesanpotti
Aug 20, 2020·ACS Sensors·Chunyu JiZhili Peng

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