Thermal control of graphene morphology: A signature of its intrinsic surface tension

Article

关键词: SUSPENDED GRAPHENE;    ELASTIC PROPERTIES;    2D CRYSTALS;    SIMULATIONS;    MEMBRANES;    WRINKLES;   

DOI  :  10.1103/PhysRevB.97.235426

来源: SCIE

【 摘 要 】

The surface tension sigma of free-standing graphene is studied by path-integral simulations as a function of the temperature and the in-plane stress. Even if the applied stress vanishes, the membrane displays a finite surface tension sigma due to the coupling between the bending oscillations and the real area of the membrane. Zero-point effects for sigma are significant below 100 K. Thermal cooling drives the membrane from a planar to a wrinkled morphology. Upon heating the change is reversible and shows hysteresis, in agreement with recent experiments performed on supported graphene.

【 授权许可】

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