Miguel Delia, Márquez Irene R, Álvarez de Cienfuegos Luis, Fuentes Noelia, Rodríguez-Bolivar Salvador, Cárdenas Diego J, Mota Antonio J, Gómez-Campos Francisco, Cuerva Juan M
Department of Organic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
Department of Electronic and Computer Technology, Faculty of Science, University of Granada, Granada, Spain.
Phys Chem Chem Phys. 2015 Dec 21;17(47):31902-10. doi: 10.1039/c5cp04631a.
The design of two dimensional graphene-type materials with an anisotropic electron flow direction in the X- and Y-axes opens the door for the development of novel electronic materials with multiple functions in nanoelectronics. In the present work, we have studied the electronic transport properties of a new family of 2D graphene-graphyne hybrids presenting conformationally free phenylethylene subunits. This system ensures two different conductive pathways that are perpendicular to each other: an acene nanoribbon subunit, in the X-axis, with graphene-type conduction, and a free to rotate phenylethylene subunit, in the Y-axis, in which the magnitude of the conduction depends dynamically on the corresponding torsion angle. Our calculations have confirmed that this system presents two different conduction pathways, which are related to the presence of asymmetric Dirac-type cones. Moreover, the Dirac cones can be dynamically modified in the presence of an external gate electrode, which is unprecedented in the literature.
在X轴和Y轴上具有各向异性电子流方向的二维石墨烯类材料的设计，为纳米电子学中具有多种功能的新型电子材料的开发打开了大门。在目前的工作中，我们研究了一类新的二维石墨烯-石墨炔杂化物的电子输运性质，这类杂化物呈现出构象自由的苯乙烯亚基。该体系确保了两条相互垂直的不同导电通路：一条在X轴上的并苯纳米带亚基，具有石墨烯型传导；另一条在Y轴上的可自由旋转的苯乙烯亚基，其传导幅度动态地取决于相应的扭转角。我们的计算证实，该体系呈现出两条不同的传导通路，这与不对称狄拉克型锥的存在有关。此外，在存在外部栅极电极的情况下，狄拉克锥可以动态改变，这在文献中是前所未有的。
