Jump to main content
Jump to site search


From Electroburning to Sublimation: Substrate and Environmental Effects in the Electrical Breakdown Process of Monolayer Graphene

Abstract

We report on the characterization of the Electrical Breakdown (EB) process for the formation of tunneling nanogaps in single-layer graphene. In particular, we investigated the role of oxygen in the breakdown process by varying the environmental conditions (vacuum and ambient conditions). We show that the density of oxygen molecules in the chamber is a crucial parameter that defines the physical breakdown process: at low density, the graphene lattice is sublimating, whereas at high density the process involved is oxidation, independent on the substrate material. To estimate the activation energies of the two processes, we use a scheme which consists of applying voltage pulses across the junction during the breaking. By systematically varying the voltage pulse length, and estimating the junction temperature from a 1D thermal model, we extract activation energies which are consistent with the sublimation of graphene in high vacuum and the electroburning process in air. Our study indicates that a better control of the gaps formation is suitable in the sublimation regime.

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Jul 2017, accepted on 03 Oct 2017 and first published on 05 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR05348G
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    From Electroburning to Sublimation: Substrate and Environmental Effects in the Electrical Breakdown Process of Monolayer Graphene

    M. El Abbassi, L. Pósa, P. Makk, C. Nef, K. Thodkar, A. Halbritter and M. Calame , Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05348G

Search articles by author

Spotlight

Advertisements