Systematic evaluation of different types of graphene oxide in respect to variations in their in-plane modulus
Artikel i vetenskaplig tidskrift, 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.

Författare

Patrick Feicht

Universitat Bayreuth

Renée Siegel

Universitat Bayreuth

Herbert Thurn

Universitat Bayreuth

Jens W. Neubauer

Leibniz-Institut fur Polymerforschung Dresden e.V.

Maximilian Seuss

Leibniz-Institut fur Polymerforschung Dresden e.V.

Tamás Szabó

University of Szeged

Alexandr V. Talyzin

Umeå universitet

C. E. Halbig

Lehrstuhl für Organische Chemie II

Siegfried Eigler

Kemi och kemiteknik, Kemi och biokemi, Organisk kemi

Daniel A. Kunz

Universitat Bayreuth

Andreas Fery

Leibniz-Institut fur Polymerforschung Dresden e.V.

Technische Universität Dresden

Georg Papastavrou

Universitat Bayreuth

Jürgen Senker

Universitat Bayreuth

Josef Breu

Universitat Bayreuth

Carbon

0008-6223 (ISSN)

Vol. 114 700-705

Ämneskategorier

Kemi

DOI

10.1016/j.carbon.2016.12.065