▎ 摘　　要

NOVELTY - A blood crystal nanosphere-graphene composite material is made of a graphene coating blood crystal nanospheres USE - Blood crystal nanosphere-graphene composite material is used as gas-sensitive electrode for detecting nitric oxide gas (claimed). ADVANTAGE - The method is simple, uses amorphous form of blood crystal to improve the detection ability of the nitric oxide gas, and provides the blood crystal nano-sphere-graphene composite material with high selectivity, high sensitivity, low power consumption, high stability, and fast characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the blood crystal nanosphere-graphene composite material.