Carbon nanotubes (CNTs) act as efficient nanoreactors, templating the assembly of sulfur-terminated graphene nanoribbons (S-GNRs) with different sizes, structures, and conformations. Spontaneous formation of nanoribbons from small sulfur-containing molecules is efficiently triggered by heat treatment or by an 80 keV electron beam. S-GNRs form readily in CNTs with internal diameters between 1 an...

In this work we show a theoretical study of the transport properties of armchair graphene nanoribbon at which linear poly-aromatic hydrocarbon molecules (LPHC) are side-attached on the ribbon edge. We describe the system by a tight-binding model and calculate the local density of states and the conductance within the Green’s function formalism. We found that the conductance curves reflect the e...

Transport in disordered armchair graphene nanoribbons (AGR) with long-range correlation between quantum wire contacts is investigated by a transfer matrix combined with Landauer's formula. The metal-insulator transition is induced by disorder in neutral AGR. Therein, the conductance is one conductance quantum for the metallic phase and exponentially decays otherwise, when the length of AGR app...

Address correspondence to guoj@ufl .edu ABSTRACT We present a semi-analytical model incorporating the effects of edge bond relaxation, the third nearest neighbor interactions, and edge scattering in graphene nanoribbon fi eld-effect transistors (GNRFETs) with armchair-edge GNR (AGNR) channels. Unlike carbon nanotubes (CNTs) which do not have edges, the existence of edges in the AGNRs has a sign...

Vertical graphene heterostructures have been introduced as an alternative architecture for electronic devices by using quantum tunneling. Here, we present that the current on/off ratio of vertical graphene field-effect transistors is enhanced by using an armchair graphene nanoribbon as an electrode. Moreover, we report spin-dependent tunneling current of the graphene/MoS2 heterostructures. When...

Self-Switching Diodes (SSD) are two terminal Nano-devices that rectify current based purely on a field effect, without the need for a third gate terminal to apply this field. They can be fabricated simply by etching two L-shaped trenches back-to-back giving rise to asymmetrical nanowires that have rectifying characteristics similar to those of conventional diodes [1]. SSDs can operate at high f...

Armchair graphene nanoribbons are considered unsuitable for spin caloritronic applications, due to the lack of intrinsic magnetism. Inspired by progress on fabricating carbon nanotubes with Janus edges Bets et al. (2019) [26], we construct edges, where one edge is armchair type and other possesses triangular protrusions zigzag-armchair or zigzag-zigzag sub-edges. By first-principles calculation...

We study the properties of flat bands that appear in a heterostructure composed strands different widths graphene armchair nanoribbons. One is reminiscent one appears pristine nanoribbons and has its origin quantum mechanical destructive interference effect, dubbed ``Wannier orbital states'' by Lin et al. Phys. Rev. B 79, 035405 (2009). The additional found these heterostructures, some reasonab...