▎ 摘　　要

Infrared radiation is a primary mechanism for heat exchange between the human body and the environment. In the framework of Mie scattering theory, we investigate the infrared absorption of a graphene-coated silk composite. We found that by coating graphene, the infrared absorption efficiency of silk fibrils is five orders larger than that without graphene coating. The observed significant enhancement in infrared absorption arises from the electromagnetic coupling between graphene and the silk. The effects of graphene's chemical potential and silk fibril diameter are also explored. Our results open a pathway to develop biological nanocomposites with tunable optical and thermal properties.