Reversible electrical reduction and oxidation of graphene oxide

Date
2011
Authors
Ekiz, O. O.
Ürel, M.
Güner, H.
Mizrak, A. K.
Dâna, A.
Advisor
Instructor
Source Title
Graphene
Print ISSN
1936-0851
Electronic ISSN
Publisher
American Chemical Society
Volume
5
Issue
4
Pages
2475 - 2482
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We demonstrate that graphene oxide can be reversibly reduced and oxidized using electrical stimulus. Controlled reduction and oxidation in two-terminal devices containing multilayer graphene oxide films are shown to result in switching between partially reduced graphene oxide and graphene, a process which modifies the electronic and optical properties. High-resolution tunneling current and electrostatic force imaging reveal that graphene oxide islands are formed on multilayer graphene, turning graphene into a self-assembled heterostructure random nanomesh. Charge storage and resistive switching behavior is observed in two-terminal devices made of multilayer graphene oxide films, correlated with electrochromic effects. Tip-induced reduction and oxidation are also demonstrated. Results are discussed in terms of thermodynamics of oxidation and reduction reactions. © 2011 American Chemical Society.

Course
Other identifiers
Book Title
Keywords
Graphene oxide, Electrochemistry, Electrochromism, Electrostatic force microscopy, Resistive switching, Tip-induced oxidation, Oxide films
Citation
Published Version (Please cite this version)