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Carbon possesses various allotropes with diverse electronic properties from insulation to conduction due to the sp, sp2, and sp3 bonding types. Here, a new sp2-sp3 carbon allotrope, called C48, is proposed. C48 presents a lilac-like structure with a cage-like center and four petal-like tubes around, and can be formed through compressing single-walled carbon nanotubes. C48 is not only strong and hard...
Carbon clathrate is a kind of typical carbon allotrope that has an open framework composed of various types of cages, displaying intriguing electronic and mechanical properties. This paper proposes a superhard superstrong carbon clathrate via first-principle calculations. This carbon clathrate, called C60 clathrate, contains 60 carbon atoms buckled through sp3-hybridized bonds in a cubic unit cell...
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