METHOD FOR SELECTIVELY PRODUCING CARBON NANOSTRUCTURE

PROBLEM TO BE SOLVED: To provide a method for producing a carbon nanostructure by using a chemical vapor deposition process. SOLUTION: A carbon source and a mixture catalyst are used, wherein the mixture catalyst includes at least one element selected from a group A including Fe, Co and Ni, and at l...

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Bibliographic Details
Main Authors KAJIURA HISASHI, KO KOKIN, ATA MASAFUMI
Format Patent
LanguageEnglish
Published 02.12.2004
Edition7
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To provide a method for producing a carbon nanostructure by using a chemical vapor deposition process. SOLUTION: A carbon source and a mixture catalyst are used, wherein the mixture catalyst includes at least one element selected from a group A including Fe, Co and Ni, and at least one supporting element selected from a group B including lanthanoid elements. The lanthanoid elements function to lower the melting point of the catalyst by forming alloys, so that the carbon nanostructures can be grown at lower temperatures. Further, the lanthanoid elements also enhance catalyst activity of Ni, Co or Fe by changing the catalyst surface electronic properties. Also, the lanthanoid elements also scavenger excess carbon so that carbon nanostructures can be grown without contamination. COPYRIGHT: (C)2005,JPO&NCIPI
Bibliography:Application Number: JP20030164408