Abstract:
PURPOSE: A method for improving purity of metallic or semiconductive carbon nanotube is prorivded to selectively separate carbon nanotube. CONSTITUTION: A method for improving purity of metallic or semiconductive carbon nanotube(CNT(12)) comprises: a stepf of disperign raw material CNT to a first solvent(14) to obtain raw material CNT solution(10); a step of adding a second solvent(24) to the raw material CNT solution and eddying; and a step of separating first CNT solution containing the first solvent and second CNT solution containing second solvent. The first solvent is phase-separated from the second solvent.