Circuit mapping is employed to study the defect content of buckytubes and carbon nanoparticles. The topological analysis enables the connection with the well established defect theory of crystalline materials. The complementarity between defect models of two- and three-dimensional structures is considered as well as the significance of dislocation descriptions of these materials. In accordance with recent experimental observations, the possibility of three-dimensional hexagonal graphitic stacking of atoms in these structures is examined through the introduction of appropriate defects that are admissible in graphite. Defects in graphene sheets introduce cap closure of isolated tubules and changes in tubule orientation, radius and helicity. In multilayered tubes, appropriate defects can accommodate curvature among adjacent sheets so that the . . . ABAB. . . stacking is preserved. However, the graphite stacking is generally destroyed in multilayered caps owing to the lack of appropriate graphite defects for their accommodation.
|Original language||English (US)|
|Number of pages||11|
|Journal||Acta Crystallographica Section A: Foundations of Crystallography|
|State||Published - 1997|
ASJC Scopus subject areas
- Structural Biology