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arXiv 1602.07296cond-mat.mtrl-scicond-mat.mes-hall
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石墨烯纳米孔与六方氮化硼的界面作为传感器件

Interface of graphene nanopore and hexagonal boron nitride as a sensing device

Fabio A. L. de Souza, Wanderla L. Scopel, Rodrigo G. Amorim, Ralph H. Scheicher

摘要:

嵌入六方氮化硼中的石墨烯条的原子精确控制合成为构建具有传感应用的纳米器件开辟了新的可能性。在这里,我们探索的电子结构和量子输运的石墨烯纳米颗粒嵌入六方氮化硼的性质,使用密度泛函理论和非平衡格林函数方法相结合,计算电导。我们发现,石墨烯纳米粒子的签名被保存在透射光谱和本地电流主要局限于石墨烯域。当在系统的石墨烯部分中产生适当尺寸的纳米孔时,电子电流被限制在沿着六方氮化硼边界运行的碳链上。这种情况可以使假设的纳米器件对通过纳米孔的分子的电子性质变得高度敏感,从而开辟了基于石墨烯纳米管中实时电导调制测量的气体分子,氨基酸甚至DNA序列检测的方法。

英文摘要:

The atomically-precise controlled synthesis of graphene stripes embedded in hexagonal boron nitride opens up new possibilities for the construction of nanodevices with applications in sensing. Here, we explore properties related to electronic structure and quantum transport of a graphene nanoroad embedded in hexagonal boron nitride, using a combination of density functional theory and the non-equilibrium Green's functions method to calculate the electric conductance. We find that the graphene nanoribbon signature is preserved in the transmission spectra and that the local current is mainly confined to the graphene domain. When a properly sized nanopore is created in the graphene part of the system, the electronic current becomes restricted to a carbon chain running along the border with hexagonal boron nitride. This circumstance could allow the hypothetical nanodevice to become highly sensitive to the electronic nature of molecules passing through the nanopore, thus opening up ways for the detection of gas molecules, amino acids, or even DNA sequences based on a measurement of the real-time conductance modulation in the graphene nanoroad.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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