Nissin Kogyo Co., Ltd.

The Furukawa Electric Co., Ltd.

Shinko Electric Industries Co., Ltd.

Mefs Kabushiki Kaisha

Kenji Takeuchi

Toru Noguchi

Hiroyuki Ueki

Satoshi Iinou

Shigeki Inukai

Satoshi Yamashita

Hideki Aizawa

Koji Fujimura

Morinobu Endo

Sumihiro Ichikawa

Kazutomi Miyoshi

Yoshio Onuma

Yoshinori Kazama

Masashige Watanabe

Yuudai Tanimura

Masatsugu Fujishige

A low-resistivity carbon nanotube aggregate includes a plurality of carbon nanotubes each having one or more walls, wherein a ratio of a total number of carbon nanotubes that have two or three walls relative to a total number of said plurality of carbon nanotubes is 75% or greater, and wherein, in a G band of a Raman spectrum in the Raman spectroscopy of the plurality of carbon nanotubes, a G+/Gtotal ratio that is indicative of an amount of semiconductor carbon nanotubes relative to metallic carbon nanotubes is 0.70 or greater.

Aggregate of carbon nanotubes, carbon nanotube composite material, and carbon nanotube wire

A method of producing carbon nanofibers includes grinding untreated carbon nanofibers produced by a vapor growth method. The untreated carbon nanofibers are ground so that the ground carbon nanofibers have a tap density 1.5 to 10 times higher than that of the untreated carbon nanofibers. A method of producing a carbon fiber composite material includes mixing carbon nanofibers into an elastomer, and uniformly dispersing the carbon nanofibers in the elastomer by applying a shear force to obtain a carbon fiber composite material.

Carbon nanofibers, method of producing carbon nanofibers, carbon fiber composite material using carbon nanofibers, and method of producing the carbon fiber composite material

A method of producing a carbon fiber composite material includes a first step and a second step. The first step includes oxidizing first carbon nanofibers produced by a vapor growth method to obtain second carbon nanofibers having an oxidized surface. The second step includes mixing the second carbon nanofibers into an elastomer, and uniformly dispersing the carbon nanofibers in the elastomer by applying a shear force to obtain the carbon fiber composite material. The second carbon nanofibers obtained by the first step have a surface oxygen concentration measured by X-ray photoelectron spectroscopy (XPS) of 2.6 to 4.6 atm %.

Carbon nanofiber, method for production thereof, method for production of carbon fiber composite material using carbon nanofiber, and carbon fiber composite material

An indium layer and a copper layer, and whenever necessary, a gallium layer or a gallium-alloy layer, are laminated on an electrode film formed on one of the surfaces of a substrate to form a metallic film. The metallic film is then subjected to sulfurization treatment or selenization treatment to form a p-type semiconductor layer made of &ldquo;CuInS,or CuInSe,&rdquo; or &ldquo;Cu(In, Ga)S,or Cu(In, Ga)Se,&rdquo;. This p-type semiconductor layer is subjected to KCN treatment, for removing impurities such as copper sulfide, copper selenide, etc., by a KCN solution, and an n-type semiconductor layer is formed on this p-type semiconductor layer to form a solar cell. In this instance, the indium layer is formed under heating, or is heat-treated by heat-treatment while the surface of the indium layer is exposed.

Compound semiconductor solar cell and production method thereof

Growing community of inventors

Nagano, Japan

Kenji Takeuchi