Jump to main content
Jump to site search

Issue 19, 2015
Previous Article Next Article

Elastic constants of graphene oxide few-layer films: correlations with interlayer stacking and bonding

Author affiliations

Abstract

We propose a strategy to study the elastic properties of extremely thin graphene oxide (GO) films using Brillouin spectroscopy. The dependence of the surface acoustic wave of a gold capping layer on the structural, chemical and morphological changes occurring to the underneath GO film with temperature is reported and analyzed. At room temperature the shear constant c44 is ∼17 GPa and hardens up to 28 GPa at 100 °C due to the partial elimination of embedded water layers and to interlayer distance shrinking. At 200 °C the almost complete elimination of water induces layer stacking disorder, further GO–GO distance reduction and a significant increase of all elastic constants. The in-plane constants harden due to the partial restoration of the sp2 C network (c11: from 268 to 620 GPa) and the out of plane constants harden due to the H bonds that now directly connect the neighbouring GO layers (c44 ≈ 80 GPa). The obtained Young's moduli are significantly higher than those reported for GO paper because the ultra-thin GO films are highly ordered and there is no macroscopic applied strain during the measurement. The results obtained here are associated with the intrinsic properties of GO as in-plane and inter-layer bonding.

Graphical abstract: Elastic constants of graphene oxide few-layer films: correlations with interlayer stacking and bonding

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Dec 2014, accepted on 09 Apr 2015 and first published on 13 Apr 2015


Article type: Paper
DOI: 10.1039/C4TC02883J
Author version
available:
Download author version (PDF)
J. Mater. Chem. C, 2015,3, 4868-4875

  •   Request permissions

    Elastic constants of graphene oxide few-layer films: correlations with interlayer stacking and bonding

    R. J. Jiménez Riobóo, E. Climent-Pascual, X. Díez-Betriu, F. Jiménez-Villacorta, C. Prieto and A. de Andrés, J. Mater. Chem. C, 2015, 3, 4868
    DOI: 10.1039/C4TC02883J

Search articles by author

Spotlight

Advertisements