▎ 摘　　要

NOVELTY - Marimo carbon contains surface-oxidized diamond microparticles, transition metal catalyst supported by the surface of diamond microparticles, and carbon nano filaments which carries out radiation expansion for isotropies from transition metal catalyst, and grow in lake ball form and having spherical form. Carbon nano filaments have primary structure formed by laminating a graphene sheet which consists of cone cup shape, on axial direction of the cone, and growing in linear. Angle distribution of half apex angle of the cone has equal distribution. USE - Marimo carbon is used for manufacturing marimo carbon catalyst, chemical sensor, catalyst carrier for fuel cell e.g. polymer electrolyte fuel cell and capacitor (all claimed). Uses include but are not limited to electromagnetic wave absorbing material, reinforcement material, catalyst material and optical material. ADVANTAGE - The marimo carbon is manufactured economically by simple method. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) marimo carbon catalyst, which comprises catalyst fine particles which are supported by the edge portion of the graphene sheet having cone cup shape contained in marimo catalyst; (2) chemical sensor, which is obtained by chemically modifying edge portion of graphene sheet contained in marimo carbon; (3) catalyst carrier; (4) manufacture of marimo carbon, which involves oxidizing diamond catalyst fine particles by which the transition metal catalyst was supported, reacting in presence of gaseous phased containing hydrocarbon at 400-600 degrees C, and growing carbon nano filaments in lake ball form; and (5) manufacture of marimo carbon catalyst.