Samsung SDI Co., Ltd. (Suwon-si, KR) earned U.S. Patent 7,678,452 for a carbon nanotube hybrid system using carbide-derived carbon which can be used to produce improved electron emission devices.
According to inventors Yoon-Jin Kim, Jae-Myung Kim Hee-Sung Moon, the carbon nanotube hybrid system includes carbide-derived carbon prepared by reacting a carbide compound and a halogen group containing gas to extract elements of the carbide compound except carbons. It also includes metals supported on the carbide-derived carbon or remaining in the carbide-derived carbon; and carbon sources from which carbon nanotubes are grown from the carbide-derived carbon.
A method of preparing the carbon nanotube hybrid system includes preparing the carbide-derived carbon, extracting elements therefrom, and growing carbon nanotubes from the carbide-derived carbon. The carbon nanotube hybrid system has excellent uniformity and a long lifetime. An electron emitter with improved electron emitting properties can be inexpensively prepared using the carbon nanotube hybrid system compared to conventional carbon nanotubes. An electron emission device with excellent electron emitting properties can be prepared using the electron emitter.
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