title: Atomic structure of reduced graphene oxide.
abstract: Using high resolution transmission electron microscopy, we identify the specific atomic scale features in chemically derived graphene monolayers that originate from the oxidation-reduction treatment of graphene. The layers are found to comprise defect-free graphene areas with sizes of a few nanometers interspersed with defect areas dominated by clustered pentagons and heptagons. Interestingly, all carbon atoms in these defective areas are bonded to three neighbors maintaining a planar sp(2)-configuration, which makes them undetectable by spectroscopic techniques. Furthermore, we observe that they introduce significant in-plane distortions and strain in the surrounding lattice.
authors.affiliation: Max-Planck-Institut fur Festkorperforschung, Stuttgart, Germany. cristina.gomez@uam.es
authors.forename: Cristina
authors.initials: C
authors.lastname: Gómez-Navarro
authors.forename: Jannik C
authors.initials: JC
authors.lastname: Meyer
authors.forename: Ravi S
authors.initials: RS
authors.lastname: Sundaram
authors.forename: Andrey
authors.initials: A
authors.lastname: Chuvilin
authors.forename: Simon
authors.initials: S
authors.lastname: Kurasch
authors.forename: Marko
authors.initials: M
authors.lastname: Burghard
authors.forename: Klaus
authors.initials: K
authors.lastname: Kern
authors.forename: Ute
authors.initials: U
authors.lastname: Kaiser