摘要
当暴露了到不同媒介时， Graphene 涂层被显示了保护内在的材料免受氧化的伤害。然而，在在房间温度的空中的 graphene 的使钝化的性质，对应于许多电子设备的操作条件，仍然保持不清楚。在这个工作，我们为时间的长时期在房间温度在空中分析 graphene/Cu 样品的氧化动力学(从 1 天到 113 天)用扫描电子显微镜学，传导性的原子力量显微镜学和钻电子显微镜学，并且我们把结果与那些为在 H2O2 对待的类似的样品获得了作比较。我们不同于暴露于 H2O2，在 graphene 领域边界的氧的累积在演变在的 graphene 表观察那一很控制了并且进步方法，在空中的 graphene 的本地氧化以一种混乱方式发生。在两个盒子中，在 graphene 领域边界形成的氧化物小丘能宣传到领域直到到达限制宽度和高度。我们的结果证明沿着域边界的内在的材料的本地氧化能戏剧性地减少粗糙，传导性，机械抵抗和 graphene 表的摩擦特征，哪个还原剂整个设备的性能。
Graphene coatings have been shown to protect the underlying material from oxidation when exposed to different media. However, the passivating properties of graphene in air at room temperature, which corresponds to the operating conditions of many electronic devices, still remain undear. In this work, we analyze the oxidation kinetics of graphene/Cu samples in air at room temperature for long periods of time （from I day to 113 days） using scanning electron microscopy, conductive atomic force microscopy and Auger electron microscop3~ and we compare the results with those obtained for similar samples treated in H202. We observe that unlike the graphene sheets exposed to H202, in which the accumulation of oxygen at the graphene domain boundaries evolves in a very controlled and progressive way, the local oxidation of graphene in air happens in a disordered manner. In both cases the oxide hillocks formed at the graphene domain boundaries can propagate to the domains until reaching a limiting width and height. Our results demonstrate that the local oxidation of the underlying material along the domain boundaries can dramatically decrease the roughness, conductivity, mechanical resistance and frictional characteristics of the graphene sheet, which reduces the performance of the whole device.
