Inducing aromaticity patterns and tuning the electronic transport of graphene nanoribbons via edge design

S. Fias*, F. J. Martin-Martinez, G. Van Lier, F. De Proft, P. Geerlings

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

Tuning the band gap of graphene nanoribbons (GNR) by chemical edge functionalization is a promising approach towards future electronic devices based on graphene. The band gap is closely related to the aromaticity distribution and therefore tailoring the aromaticity patterns is a rational way for controlling the band gap. In our work, it is shown how to control the aromaticity distribution and the band-gap in both armchair and zigzag GNRs. We perform periodic density functional theory (DFT) calculations on the electronic structure and the aromaticity distribution, using delocalization and geometry analysis methods like the six-center index (SCI) and the mean bond length (MBL). These results are compared with nonequilibrium Green's function (NEGF) transport property calculations. We also provide a complete description of the relation between band gap, transport properties, and aromaticity distribution along these materials, based on DFT results and Clar's sextet theory.

Original languageEnglish
Title of host publicationTechnical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014
PublisherNano Science and Technology Institute
Pages29-32
Number of pages4
ISBN (Print)9781482258264
Publication statusPublished - 2014
EventNanotechnology 2014: Graphene, CNTs, Particles, Films and Composites - 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014 - Washington, DC, United States
Duration: 15 Jun 201418 Jun 2014

Publication series

NameTechnical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014
Volume1

Conference

ConferenceNanotechnology 2014: Graphene, CNTs, Particles, Films and Composites - 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014
Country/TerritoryUnited States
CityWashington, DC
Period15/06/201418/06/2014

Keywords

  • Aromaticity
  • Band gap
  • Clar's sextet theory
  • Graphene nanoribbons
  • Transport properties

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