Reversible Electrical Reduction and Oxidation of Graphene Oxide

Abstract

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

A Review on Reducing Graphene Oxide for Band Gap Engineering

“…This enables modulating the band gap as demonstrated in its current-voltage (I-V) characteristics . Ekiz et al's study also emphasizes the importance of tuning the degree of both oxidation and reduction between gradual decrease and increase of the amount of oxygen in rGO (Ekiz et al, 2011).…”

Imaging and spectrum of monolayer graphene oxide in external electric field

“…It is found that the reversible behavior could repeat for >100 cycles (about 1 h), as shown in Fig. S1, which is much more than that in multilayer GO with just several cycles [25]. Moreover, the modulated depths of transmission light in mGO are significantly improved compared with that in graphene of about 1.5% [29].…”

Flexible and transparent resistive switching devices using Au nanoparticles decorated reduced graphene oxide in polyvinyl alcohol matrix

“…This explains the origin of non-zero current at 0V, when the device is swept from -4 to +4V. Ekiz et al [36] reported the formation of RGO from the GO by electrical bias. When the negative voltage is applied, the electrochemical reaction takes place, resulting in the reduction of GO.…”