The electronical properties are dominated by the ribbon width and edge structure (armchair and zigzag).All zigzag ribbons are metals, while armchair ribbons are metals only for N=3I+2 (I is integer).

• 石墨带电子性质是由石墨带宽度与边界结构所支配(手椅状和锯齿状)，所有的锯齿状石墨带都是金属性质，手椅状石墨带则只有在宽度N=3I+2(I是整数)才是金属。