The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 2007
Filed:
Oct. 20, 2003
Yasunori Sakurabayashi, Toyota, JP;
Takuya Kondo, Toyota, JP;
Yasushi Yamazawa, Aichi-ken, JP;
Yoshinao Suzuki, Toyota, JP;
Marc Monthioux, Aussonne, FR;
Mikako Le. Lay, Brussels, BE;
Yasunori Sakurabayashi, Toyota, JP;
Takuya Kondo, Toyota, JP;
Yasushi Yamazawa, Aichi-ken, JP;
Yoshinao Suzuki, Toyota, JP;
Marc Monthioux, Aussonne, FR;
Mikako LE. Lay, Brussels, BE;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A method is presented for effectively manufacturing multi-wall (double-wall, etc.) carbon nanotubes (CNTs) having a structure whereby interior tubes are formed within the CNTs. In this manufacturing method, fullerene/CNT hybrid structures are prepared, wherein assembled fullerenes, these being fullerenes that are linked, have been housed within single-wall CNTs. The interior tubes are formed from the assembled fullerenes by subjecting the hybrid structures to electron beam irradiation while in a heated state. It is preferred that irradiation with the electron beams occurs at a temperature of 100˜500° C. and with the electron beams having an accelerating voltage of 80˜250 kV. According to the manufacturing method of the present invention, multi-wall CNTs with few defects can be manufactured at lower temperatures and in a shorter period than in the case where the fullerene/CNT hybrid structures are only maintained under high temperature conditions (and electron beam irradiation is not performed).