Thin-film-like particles having skeleton constructed by carbons and isolated films

摘要

Thin-film-like particles and isolated films of an extremely small thickness having a skeleton constructed by carbons are provided. The thin-film-like particles take independent shapes, have a thickness of 0.4 to 10 nm and a breadth in a planar direction of 20 nm or more, and can disperse in a liquid having a relative dielectric constant of 15 or more. The thin-film-like particles are obtained by promoting separation of layers in oxidation of graphite. The particles in their dispersion are placed, along with the dispersion, on a mesh, and dried to obtain an isolated thin film. The thin-film-like particles are reduced to obtain thin-film-like graphite particles and these collective matters.