Patent number: 7829494
Abstract: A method for synthesizing carbon nanocoils with high efficiency, by determining the structure of carbon nuclei that have been attached to the ends of carbon nanocoils and thus specifying a true catalyst for synthesizing carbon nanocoils is implemented. The catalyst for synthesizing carbon nanocoils according to the present invention is a carbide catalyst that contains at least elements (a transition metal element, In, C) or (a transition metal element, Sn, C), and in particular, it is preferable for the transition metal element to be Fe, Co or Ni. In addition to this carbide catalyst, a metal catalyst of (Fe, Al, Sn) and (Fe, Cr, Sn) are effective. From among these, catalysts such as Fe3InC0.5, Fe3InC0.5Snw and Fe3SnC are particularly preferable. The wire diameter and the coil diameter can be controlled by using a catalyst where any of these catalysts is carried by a porous carrier.
Type:
Grant
Filed:
May 28, 2004
Date of Patent:
November 9, 2010
Assignees:
Japan Science and Technology Agency, Public University Corporation, Osaka Prefecture University, Otsuka Chemical Co., Ltd., Nissin Electric Co., Ltd.
Inventors:
Yoshikazu Nakayama, Lujun Pan, Toshikazu Nosaka, Osamu Suekane, Nobuharu Okazaki, Takeshi Nagasaka, Toshiki Goto, Hiroyuki Tsuchiya, Takashi Okawa, Keisuke Shiono
Publication number: 20070098622
Abstract: A method for synthesizing carbon nanocoils with high efficiency, by determining the structure of carbon nuclei that have been attached to the ends of carbon nanocoils and thus specifying a true catalyst for synthesizing carbon nanocoils is implemented. The catalyst for synthesizing carbon nanocoils according to the present invention is a carbide catalyst that contains at least elements (a transition metal element, In, C) or (a transition metal element, Sn, C), and in particular, it is preferable for the transition metal element to be Fe, Co or Ni. In addition to this carbide catalyst, a metal catalyst of (Fe, Al, Sn) and (Fe, Cr, Sn) are effective. From among these, catalysts such as Fe3InC0.5, Fe3InC0.5Snw and Fe3SnC are particularly preferable. The wire diameter and the coil diameter can be controlled by using a catalyst where any of these catalysts is carried by a porous carrier.
Type:
Application
Filed:
May 28, 2004
Publication date:
May 3, 2007
Applicants:
Japan Science and Technology Agency, Public University Corporation, Osaka Prefecture University, Taiyo Nippon Sanso Corporation, Otsuka Chemical Co., Ltd., Nissin Electric Co., Ltd.
Inventors:
Yoshikazu Nakayama, Lujun Pan, Toshikazu Nosaka, Osamu Suekane, Nobuharu Okazaki, Takeshi Nagasaka, Toshiki Goto, Hiroyuki Tsuchiya, Takashi Okawa, Keisuke Shiono