Citation: Hong-Jin WANG, Gui YIN. Orange emission graphene oxide quantum dots: A one-pot strategy for highly efficient fabrication and application in the imaging of pH in living cells[J]. Chinese Journal of Inorganic Chemistry, ;2023, 39(7): 1338-1348. doi: 10.11862/CJIC.2023.106 shu

Orange emission graphene oxide quantum dots: A one-pot strategy for highly efficient fabrication and application in the imaging of pH in living cells

Hong-Jin WANG ¹ ,
Gui YIN ^{1, 2,,}

1.
College of Chemistry and Environmental Science, Yili Normal University, Yining, Xinjiang 835000, China
2.
State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

Corresponding author: Gui YIN, yingui@nju.edu.cn
Received Date: 11 April 2023
Revised Date: 10 May 2023

Figures(8)

A simple, quick, and efficient chemical oxidation technique was employed to fabricate excellent biocompatible orange fluorescence graphene oxide quantum dots (GOQDs) with affordable, widely available graphite flake as the raw material. The as-prepared GOQDs have uniform sizes of ca. 7.2 nm, highly crystallized core with a lattice spacing of 0.20 nm, and oxidized peripherals. Unlike most reported doped-carbon dots, the GOQDs displayed orange-red independent fluorescent emission when the excitation wavelength was changed. The pH dependence emission, strong resistance of photobleaching, low cytotoxicity, good water solubility (ρ=10 mg·mL^-1), and excellent biocompatibility behaviors made GOQDs successfully applied to live cell pH fluctuation imaging.
- graphene oxide quantum dots,
- orange fluorescence,
- pH sensor,
- living cell imaging
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