| http://www.w3.org/ns/prov#value | - Recently, a carbonaceous material, such as carbon nanotubes which have a work function of a low value and are very stable, has been attracting increasing attention as an electrode material for an electron gun or a cold cathode type electron emission element (FED: Field Emitter Device), as is described, for example, in Japanese Patent Publication No.10-199398.
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