▎ 摘　　要

NOVELTY - The method involves preparing a multi-wall carbon nano tube. An outer tube of the multi-wall carbon nano tube is cut. A clean inner tube is exposed to obtain a carbon nano-tube with a clean surface, where a catalyst of the multi-wall carbon nano-tube is selected from iron, cobalt, nickel, chromium, molybdenum, copper and lead and a wall number of the multi-wall carbon nanotube is 2-10 layers and a substrate of the multi-wall carbon nano-tube is gold, copper, aluminum, silicon, germanium, graphene, highly oriented pyrolytic graphite, silicon dioxide, aluminum oxide, molybdenum disulfide, tungsten disulfide, glass, ceramic, polyethylene terephthalate, polyethylene naphthalate, polyarylate, polycarbonate, polyethylene polyimide, polysiloxane or polyacrylate substrate. A suspended portion of the carbon nano-tube is pushed by a high speed air flow such that local stress concentration exceeds an intensity limit of the carbon nano-tube outer tube. USE - Method for manufacturing clean surface carbon nano-tube for use in nano-electronics field. ADVANTAGE - The method enables ensuring high cleanliness during manufacturing of the clean surface carbon nano, reducing impurities introduced in the manufacturing process, avoiding need of post-treatment after preparation, and satisfying carbon nano-tube surface cleanness requirement. DESCRIPTION OF DRAWING(S) - The drawing shows a photographic view of a multi-wall carbon nanotube sample. (Drawing includes non-English language text).