Reversible electrical reduction and oxidation of graphene oxide
Date
2011Source Title
Graphene
Print ISSN
1936-0851
Publisher
American Chemical Society
Volume
5
Issue
4
Pages
2475 - 2482
Language
English
Type
ArticleItem Usage Stats
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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.
Keywords
Graphene oxideElectrochemistry
Electrochromism
Electrostatic force microscopy
Resistive switching
Tip-induced oxidation
Oxide films