Nacre‐like graphene films are prepared by evaporation‐induced assembly of graphene oxide dispersions containing small amounts of cellulose nanocrystal (CNC), followed by chemical reduction with hydroiodic acid. CNC induces the formation of wrinkles on graphene sheets, greatly enhancing the mechanical properties of the resultant graphene films. The graphene films deliver an ultrahigh tensile strength of 765 ± 43 MPa (up to 800 MPa in some cases), a large failure strain of 6.22 ± 0.19%, and a superior toughness of 15.64 ± 2.20 MJ m⁻³, as well as a high electrical conductivity of 1105 ± 17 S cm⁻¹. They have a great potential for applications in flexible electronics because of their combined excellent mechanical and electrical properties.

中文翻译：

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超强高导电石墨烯薄膜的拓扑设计

通过蒸发诱导组装的石墨烯氧化物分散体（其中包含少量纤维素纳米晶体（CNC）），然后用氢碘酸进行化学还原，来制备类似珍珠母的石墨烯薄膜。CNC诱导在石墨烯片上形成皱纹，极大地增强了所得石墨烯薄膜的机械性能。石墨烯薄膜具有765±43 MPa的超高抗拉强度（在某些情况下高达800 MPa），6.22±0.19％的大破坏应变以及15.64±2.20 MJ m ^-3的超强韧性，以及1105±17 S cm ^-1的高电导率。由于它们优异的机械和电气性能，它们在柔性电子产品中具有巨大的应用潜力。