▎ 摘　　要

NOVELTY - Polydopamine-modified reduced graphene oxide comprises reduced graphene oxide and polydopamine which is physically adsorbed to the surface of reduced graphene oxide. USE - Polydopamine-modified reduced graphene oxide is used in photoacoustic ultrasound multimodal imaging or in preparation of photothermal cancer therapy applications (all claimed). ADVANTAGE - The polydopamine-modified reduced graphene oxide can be mass-produced by a simple and environment-friendly method at low reduction temperature, without using a stabilizer. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of polydopamine-modified reduced graphene oxide, which involves completely dissolving graphene oxide and dopine hydrochloride in a mass ratio of (1-4):(1-4) in a solvent to obtain a mixed solution, adjusting the pH of mixed solution to 8.5-9, and reacting at 55-65 degrees C for 12-24 hours.