What is the name for graphene that is shaped into a sphere, known for its stability under pressure?

The correct answer is Buckyball. Buckyballs are a specific form of fullerene, which is a type of molecule composed entirely of carbon, arranged in a hollow sphere, ellipsoid, or tube. The most well-known structure is C60, which resembles a soccer ball or a geodesic dome made up of pentagons and hexagons.

Buckyballs are renowned for their remarkable stability under various conditions, including high pressure. This stability makes them a subject of significant interest in nanotechnology, as they exhibit unique electrical, optical, and chemical properties. Their spherical shape allows for efficient packing and potential applications in drug delivery, materials science, and energy storage.

Even though Graphene sphere and Fullerene could relate to the context, they do not specifically denote the stable spherical form of graphene that is characterized by its unique properties akin to Buckyballs.