Topologic classification and geometry structure of planar three-terminal junctions of Y-type carbon nanotubes with C2v symmetry

Y-junctions of C2y symmetry carbon nanotubes with defects located between nanotubes have been considered. Three-terminal building scheme has been suggested. It has been found that the defects may transform to each other either by Stone-Walse transformation or by deleting or incorporating of two carbon atoms.