导电性和刚度可调的纳米碳薄片
One nanometer thin carbon nanosheets with tunable conductivity and stiffness
摘要：
我们提出了一种制备纳米碳膜的新方法，其电学行为可以从绝缘到导电进行调节。联苯的自组装单分子膜通过电子交联，从表面分离，随后热解。高于1000 K，交联的芳族单层形成机械稳定的石墨相。这种转变伴随着薄层电阻率从~10^8降到~10^2 kOhm/sq，纳米膜的机械硬化从~10降到~50 GPa。纳米片的技术适用性通过将它们并入显微压力传感器来证明
英文摘要：
We present a new route for the fabrication of ultrathin (~1 nm) carbon films and membranes, whose electrical behavior can be tuned from insulating to conducting. Self-assembled monolayers of biphenyls are cross-linked by electrons, detached from the surfaces and subsequently pyrolized. Above 1000K, the cross-linked aromatic monolayer forms a mechanically stable graphitic phase. The transition is accompanied by a drop of the sheet resistivity from ~10^8 to ~10^2 kOhm/sq and a mechanical stiffening of the nanomembranes from ~10 to ~50 GPa. The technical applicability of the nanosheets is demonstrated by incorporating them into a microscopic pressure sensor
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