▎ 摘　　要

NOVELTY - Synthesis of graphene quantum dots comprises adding DNA to a container, adding deionized water, stirring, and dispersing until completely dissolved to obtain DNA solution; placing the DNA solution in a high-pressure hydrothermal kettle, and carrying out high-pressure reaction to obtain a brownish yellow material; and separating the brownish yellow material by centrifuging. USE - The method is used in synthesizing graphene quantum dots for biological cell imaging. ADVANTAGE - The graphene quantum dots have good dispersibility and stability.