Assertion: atom's structure | /r/MadeOf | coupled graphene layers
Facets:
value: weakly
type: MANNER
value: relatively
type: DEGREE
Source sentences:
text: Graphene is a parent form of all graphitic structures of carbon: graphite, which is a three-dimensional crystal consisting of relatively weakly coupled graphene layers; nanotubes, which may be represented as scrolls of graphene; and buckyballs, spherical molecules made from graphene with some hexagonal rings replaced by pentagonal rings.