论文标题
定义明确的亚纳米石墨烯丝带在碳纳米管内合成
Well-defined sub-nanometer graphene ribbons synthesized inside carbon nanotubes
论文作者
论文摘要
具有子纳米宽度的石墨烯纳米纤维对于纳米级电子和设备非常有趣，因为它们将石墨烯的异常传输特性与横向尺寸中的量子限制引起的频带间隙的开口相结合。目前，强大的研究工作是为了种植这种纳米管。在这里，我们显示了6臂和7臂石墨烯纳米纤维的合成，宽度为0.61和0.74 nm，以及通过高温真空消除单壁碳纳米管内的高温真空消除了高温真空消除。原子分辨率电子显微镜证明了所谓的石墨烯纳米纤维的封装，而它们的分配是通过广泛的波长依赖性拉曼散射和量子化学计算的组合提供的。这些发现实现了一种可轻松且可扩展的方法，从而导致对良好定义的亚纳米石墨烯纳米容器的受控生长和详细分析。
Graphene nanoribbons with sub-nanometer widths are extremely interesting for nanoscale electronics and devices as they combine the unusual transport properties of graphene with the opening of a band gap due to quantum confinement in the lateral dimension. Strong research efforts are presently paid to grow such nanoribbons. Here we show the synthesis of 6- and 7-armchair graphene nanoribbons, with widths of 0.61 and 0.74 nm, and excitonic gaps of 1.83 and 2.18 eV, by high-temperature vacuum annealing of ferrocene molecules inside single-walled carbon nanotubes. The encapsulation of the so-obtained graphene nanoribbons is proved by atomic resolution electron microscopy, while their assignment is provided by a combination of an extensive wavelength-dependent Raman scattering characterization and quantum-chemical calculations. These findings enable a facile and scalable approach leading to the controlled growth and detailed analysis of well-defined sub-nanometer graphene nanoribbons.
