Systematic evaluation of different types of graphene oxide in respect to variations in their in-plane modulus
Journal article, 2017

Graphene oxide samples prepared in various laboratories following a diversity of synthesis protocols based on Brodie's (BGO) and Hummers/Offeman's (HGO) methods were compared in respect of their in-plane moduli. A simple wrinkling method allowed for a spatial resolution <1.5 ?m by converting the wrinkling frequency. Quite surprisingly, a drastic variation of the in-plane moduli was found spanning the range from 600 GPa for the best BGO types, which is in the region of chemically derived graphene, all the way down to less than 200 GPa for HGO types. This would suggest that there are no two equal GO samples and GO should not be regarded a compound but rather a class of materials with very variable physical properties. While large differences between Brodie's and Hummers/Offeman's types might have been expected, even within the group of Hummers/Offeman's types pronounced differences are observed that, based on 13C solid-state NMR, were related to over-functionalization versus over-oxidation.

Author

Patrick Feicht

University of Bayreuth

Renée Siegel

University of Bayreuth

Herbert Thurn

University of Bayreuth

Jens W. Neubauer

Leibniz Institute for Polymer Research

Maximilian Seuss

Leibniz Institute for Polymer Research

Tamás Szabó

University of Szeged / Szegedi Tudományegyetem

Alexandr V. Talyzin

Umeå University

C. E. Halbig

Lehrstuhl für Organische Chemie II

Siegfried Eigler

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Organic Chemistry

Daniel A. Kunz

University of Bayreuth

Andreas Fery

Leibniz Institute for Polymer Research

Technische Universität Dresden

Georg Papastavrou

University of Bayreuth

Jürgen Senker

University of Bayreuth

Josef Breu

University of Bayreuth

Carbon

0008-6223 (ISSN)

Vol. 114 700-705

Subject Categories

Chemical Sciences

DOI

10.1016/j.carbon.2016.12.065

More information

Latest update

3/2/2018 6