|
Phagraphene () is a proposed graphene allotrope composed of 5-6-7 carbon rings. Phagraphene was proposed in 2015 based on systematic evolutionary structure searching. Theoretical calculations showed that phagraphene is not only dynamically and thermally stable, but also has distorted Dirac cones. The direction-dependent cones are further proved to be robust against external strain with tuneable Fermi velocities.〔 It is noted that there are higher-energy allotropes named as Haeckelite contained penta- hexa- and hepta-carbon rings. Three types (rectangular, oblique and hexagonal) were proposed as early as 2000. And these metastable allotropes were revealed to have a trival intrinsic metallic behavior. Phagraphene is predicted to have a potential energy of 193.2 kcal/mol. The bond order is 1.33, the same as for graphene.〔 There is an unrelated material called PHA/graphene which is a polyhydroxyalkanoate graphene composite. ==References== category:Graphene 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phagraphene」の詳細全文を読む スポンサード リンク
|