使石墨烯单层经受拉伸和压缩
Subjecting a graphene monolayer to tension and compression
摘要：
石墨烯片在拉伸和压缩下的机械行为使用的微束排列检查。采用了两组不同的样品，涉及仅支撑在塑料棒上但也嵌入塑料基材内的薄片。通过监测的位移的二维拉曼线与应变，应力传递效率作为应力符号和单层支撑的函数的信息。在张力下，嵌入的薄片似乎承受高达1.3%的应变，而在压缩下，在约0.7%的应变下存在薄片屈曲的指示。保持这样高的临界屈曲应变证实了嵌入单层的相对高的抗弯刚度。
英文摘要：
The mechanical behaviour of graphene flakes under both tension and compression is examined using a cantilever-beam arrangement. Two different sets of samples were employed involving flakes just supported on a plastic bar but also embedded within the plastic substrate. By monitoring the shift of the 2D Raman line with strain, information on the stress transfer efficiency as a function of stress sign and monolayer support were obtained. In tension, the embedded flake seems to sustain strains up to 1.3%, whereas in compression there is an indication of flake buckling at about 0.7% strain. The retainment of such a high critical buckling strain confirms the relative high flexural rigidity of the embedded monolayer.
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