“…Altogether, this markedly influences the allotropy of carbon, which is the richest among all chemical elements. Familiar allotropic forms of carbon include graphite, rhombohedral graphite, diamond, lonsdaleite, amorphous carbon (soot with variable sp 2 /sp 3 carbon atom contents), and a huge variety of human-made high-specific surface area carbons, carbon aerogels [ 1 , 2 ], carbon foams [ 3 , 4 ], glassy carbon [ 5 , 6 ], polyynes [ 7 ], diverse fullerenes from C 12 to as large as C 960 [ 8 , 9 ], a multitude of single wall nanotubes [ 10 , 11 ], nano-onions [ 12 ], and more. Last but not least, they include graphene, which has unique physical properties [ 12 ].…”