Transport modulation of graphene nanoribbons with side-attached organic molecules

Abstract

In this work we address the effects on the conductance of graphene nanoribbons (GNRs) at which organic molecules are side-attached on the ribbon ends. For simplicity, only armchair (AGNRs) and zigzag (ZGNRs) nanoribbons are considered and quasi one-dimensional molecules, such as linear poly-aromatic hydrocarbon (LPHC) and poly(para-phenylene), are chosen. The conductance of the GNRs exhibit a particular behavior as a function of the length of the organic molecules: the energy spectrum of the quasi one-dimensional system is clearly reflected in the conductance curves of the GNRs. The results suggest that GNRs can be used as an spectrograph-sensor device. An even-odd parity effect, as a function of the length of the attached molecules, can be observed in the conductance of these system. The nanostructures are described using a single-band tight binding Hamiltonian and the electronic conductance and the density of states of the systems are calculated within the Green's function formalism based on real-space renormalization techniques.

5 pages, 7 figures

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• The Raman Fingerprint of Graphene
• Energy Gaps in Graphene Nanoribbons
• Valley filter and valley valve in graphene
• Tuning the electronic structures of armchair graphene nanoribbons through chemical edge modification: A theoretical study
• Complex-band structure: a method to determine the off-resonant electron transport in oligomers

Cited by in corpus (4)

• Electronic transport through bilayer graphene flakes
• Modeling of gas adsorption on graphene nanoribbons
• Ab initio study of spin-dependent transport in carbon nanotubes with iron and vanadium adatoms
• Transport properties of graphene quantum dots