▎ 摘 要
NOVELTY - A fluorescent graphene nanomaterial is obtained by reacting nano graphene obtained by electrochemistry and hydrazine hydrate under room temperature or temperature less than room temperature. USE - Fluorescent graphene nanomaterial is used as biological imaging agent, developing agent and tracer and in medicine field (all claimed), drug carrier for detecting, diagnosing and treating diseases, and label cells. ADVANTAGE - The fluorescent graphene nanomaterial has excellent biocompatibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of fluorescent graphene nanomaterial.