▎ 摘　　要

NOVELTY - Manufacturing graphene nanoball comprises (i) disposing the coffee grounds and the nanoparticle matrix apart from each other, and (ii) forming a graphene layer on the nanoparticle matrix by performing chemical vapor deposition using coffee grounds as a carbon source. USE - The method is useful for manufacturing graphene nanoball. ADVANTAGE - The method is economical, and manufactures graphene nanoballs has excellent durability. DESCRIPTION OF DRAWING(S) - The drawing shows a graph sequentially showing a method of manufacturing a pin nanoball (Drawing includes non-English language text).