含孔缺陷石墨烯纳米条带的电学特性研究

本文系统地研究了不同形状(三方、四方及六方) 的孔缺陷对锯齿形石墨烯纳米条带电学特性的影响. 结果表明: 孔缺陷形状对于石墨烯纳米条带的电导及电流特性影响显著, 其可能源于不同形状的孔缺陷边界对于电子散射的不同; 另外, 当缺陷悬挂吸附氢或氮原子, 将引起孔缺陷形状改变, 因此不同孔缺陷吸附对于石墨烯纳米条带的电学特性的影响也各不相同. 本研究将为石墨烯基电子器件失效分析及石墨烯孔结构器件设计提供有价值的理论指导. 关键词： 石墨烯 孔缺陷 电学特性

Studies on electrical properties of graphene nanoribbons with pore defects

In practical applications of graphene-based electronic devices, they may have some pore defects under energetic particle bombardment, or chemical corrosion, which will inevitably affect their electrical properties. These problems have recently aroused great concern and interest. In this paper, we systematically study the influence of shape (tripartite, tetragonal and hexagonal) of hole defect on the electrical property of zigzag graphene nanoribbon (ZGNR). The results show that the influence of the shape of the pore defects on the conductance and current characteristics of ZGNRs is significant, whicl may result from electron scattering for the different shapes of the poredefect boundary. In addition, due to defects in suspension adsorbed hydrogen or nitrogen atoms, caused by defects of the pore shape changes, it also affects the electrical properties of ZGNRs. This study will supply valuable theoretical guidances for graphene-based electronic device failure analysis and the design of the graphene pore structure.