Work

Reversible Electrical Reduction and Oxidation of Graphene Oxide

Year: 2011

Type: article

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.

Source: ACS Nano

DOI: 10.1021/nn1014215

Authors: Okan Öner Ekiz, Mustafa Ürel, Hasan Güner, Alpay Koray Mizrak, Aykutlu Dâna

Institution: Bilkent University

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funder: Türkiye Bilimsel ve Teknolojik Araştırma Kurumu

Award: Nano ve mikroelektromekanik sistemler ile küçük kuvvetlerin ölçülmesi ve görüntüleme