2008年8月下旬,美国哥伦比亚大学两名华裔科学家李成古和魏小丁(音译)研究发现,铅笔石墨中一种叫石墨烯的二维碳原子晶体比钻石还坚硬,强度比世界上最好的钢铁还要高100倍。这种物质不仅可以用来开发制造出纸片般薄的超轻型飞机材料、超坚韧的防弹衣和“太空电梯”用的超韧缆线 In late August 2008, two Chinese scientists at Columbia University, Li Chenggu and Wei Xiaoding, found that a two-dimensional carbon crystal called graphene in pencil graphite is harder than diamonds and harder than the best in the world Steel is 100 times more expensive. Not only can this material be used to develop ultra-light aircraft materials that are thinner than paper, super-tough body armor and ultra-tough cables for “space elevators”