I'm having a discussion with a co-worker about the upper limits on the size of a Buckyball. He feels you could create a buckyball the size (surface area) of a bowling ball. I was pretty sure that once the the molecule got above a certain size the 'closeness' of the atoms and the massive numbers involved would create a gravity problem. The gravity of such a dense collection of atoms would defeat the molecular bonds.
Neither of us are chemists, but we both think we know more than we probably do . So we're both going to be hard to convince we are wrong. If there are any good sources you could point us to, it would be appreciated.