Carbon nanoballoon structure and method for preparation thereof, and electron emitter
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United States of America Patent
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Jul 13, 2010
Grant Date -
Sep 6, 2007
app pub date -
Mar 25, 2005
filing date -
Mar 30, 2004
priority date (Note) -
Expired
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Abstract
A hollow carbon nanoballoon structure having a relatively large closed space, and a method of producing a carbon nanoballoon structure capable of easily and stably producing such a structure. The carbon nanoballoon structure is obtained by heating soot prepared by an arc discharge using carbon electrodes, soot prepared by vaporizing carbon by laser irradiation, or carbon black having a specific surface area of 1000 m2/g or more and a primary particle diameter of 20 nm or more at a high temperature in an inert gas atmosphere, and includes graphite sheets linked to form a curved surface.
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