content: Wouldn't this suggest that atoms are 1 dimmentional? This can't be true. Atoms must have some measurable size to them making even graphene three dimensional, although very thin, wouldn't it?  No it suggests that all other materials have qualities that are inherent due to properties across atoms that are position in 3 dimensions. Graphene can be indexed in 2D, other materials cease to be those materials in 2D, but become something else. Even gold, if you beat gold thin, it's 300 atoms thick, if you beat it 1 atom thick, you'd get something that is "gold" in the sense that graphene is "carbon" but it wouldn't be gold in the sense that "gold" is gold. 1 atom thick gold might appear silver or another color. let me google it a sec: yeah one idiot posted this but it appears 1 atom thick gold might appear pink, but metallic. So, most/all/whoknows crystals require a 3D structure, so materials thinner than that are fundamentally different materials. Their identity requires 3D. Metals for instance, look at the crystalline structure of pure or alloyed metals. You can't/orfuckitmaybeyoucan have a 1 atom thick crystalline structure, but it will be different to the 3D one.