Nagoya University

Tokai National Higher Education and Research System

Nagase Viita Co., Ltd.

Hisanori Shinohara

Kenichiro Itami

Yasutomo Segawa

Haruka Omachi

Yusuke Nakanishi

Kazuhiko Akiyama

Hikaru Watanabe

Tatsuyuki Hamano

Ryo Kitaura

To reduce cost for the method for separating semiconducting carbon nanotube from a mixture of metallic and semiconducting carbon nanotubes. The separation method includes preparing a dispersion by mixing a first substance, a second substance, SDS, SC, and a mixture of metallic and semiconducting carbon nanotubes with a solvent, wherein the dispersion into two layers, which are a first layer mainly containing the first substance and a second layer mainly containing the second substance, whereby the semiconducting carbon nanotube is transferred into the first layer, and the metallic carbon nanotube is transferred into the second layer, wherein the first substance is an α-glucan which is composed of glucose linked via α-glucosidic linkage and which has a weight average molecular weight Mw of 4,000 to 7,000 and has a ratio in amount of α-1, 6 linked glucose residues to the entire glucose residues of 40 to 70%.

Method for separating semiconducting carbon nanotubes, and mixed solution, and dispersion of semiconducting carbon nanotubes

Carbon nanotubes (CNTs) having a desired diameter are selectively produced by reacting a carbon source with a cyclic compound in which multiple aromatic rings are continuously bonded. The reaction is preferably performed by supplying a gaseous carbon source under reduced pressure and heating. The cyclic compound in which multiple aromatic rings are continuously bonded is preferably a cyclic compound in which bivalent aromatic hydrocarbon groups are continuously bonded, or a modified cycloparaphenylene compound in which a cycloparaphenylene compound or at least one phenylene group of the cycloparaphenylene compound is substituted with a condensed cyclic group such as a naphthylene group.

Carbon nanotube manufacturing method

A method for recovering an endohedral metallofullerene comprises a complexation step of adding a Lewis acid comprising titanium halide or tin halide to a reaction solution formed by dissolving crude fullerenes in a solvent, thereby forming a complex of the endohedral metallofullerene and the Lewis acid, a filtering step of filtering the reaction solution to separate the complex, and a washing step of removing the Lewis acid from the complex to obtain the endohedral metallofullerene. The obtained endohedral metallofullerene is soluble in a solvent. This method provides a high recovery yield of the endohedral metallofullerene.

Method for collecting metal-containing fullerene

Growing community of inventors

Nagoya, Japan

Hisanori Shinohara