Microwave- and nitronium ion-enabled rapid and direct production of highly conductive low-oxygen graphene.

@article{Chiu2012MicrowaveAN,
  title={Microwave- and nitronium ion-enabled rapid and direct production of highly conductive low-oxygen graphene.},
  author={Pui Lam Chiu and Daniel D T Mastrogiovanni and Dongguang Wei and C. Nirmala Louis and Min Hye Jeong and Guo Yu and Peter Saad and Carol R Flach and Richard Mendelsohn and Eric L. Garfunkel and Huixin He},
  journal={Journal of the American Chemical Society},
  year={2012},
  volume={134 13},
  pages={
          5850-6
        }
}
Currently the preferred method for large-scale production of solution-processable graphene is via a nonconductive graphene oxide (GO) pathway, which uncontrollably cuts sheets into small pieces and/or introduces nanometer-sized holes in the basal plane. These structural changes significantly decrease some of graphene's remarkable electrical and mechanical properties. Here, we report an unprecedented fast and scalable approach to avoid these problems and directly produce large, highly conductive… 

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References

SHOWING 1-10 OF 71 REFERENCES

High-yield production of graphene by liquid-phase exfoliation of graphite.

TLDR
Graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone are demonstrated.

High-throughput solution processing of large-scale graphene.

TLDR
The chemically converted graphene sheets that were produced have the largest area reported to date (up to 20 x 40 microm), making them far easier to process, and field-effect devices have been fabricated by conventional photolithography, displaying currents that are three orders of magnitude higher than previously reported for chemically produced graphene.

Determination of the Local Chemical Structure of Graphene Oxide and Reduced Graphene Oxide

TLDR
This study presents one particular synthetic method for GO and raGO, and reveals that the raGO material under study is greatly structurally dissimilar to graphene, being unstable under signifi cant electron beam.

Structural evolution during the reduction of chemically derived graphene oxide.

TLDR
The chemical changes of oxygen-containing functional groups on the annealing of graphene oxide are elucidated and the simulations reveal the formation of highly stable carbonyl and ether groups that hinder its complete reduction to graphene.

Production of graphene sheets by direct dispersion with aromatic healing agents.

TLDR
Graphene exhibits remarkable properties for various novel applications, and liquid-based techniqueshave the potential to realize large-scale organic devices including photovoltaic cells.

Carbon-Based Supercapacitors Produced by Activation of Graphene

TLDR
This work synthesized a porous carbon with a Brunauer-Emmett-Teller surface area, a high electrical conductivity, and a low oxygen and hydrogen content that has high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes.

A one-step, solvothermal reduction method for producing reduced graphene oxide dispersions in organic solvents.

TLDR
SRGO sheets are redispersible in a variety of organic solvents, which may hold promise as an acceptor material for bulk heterojunction photovoltaic cells, or electromagnetic interference shielding applications.

Highly conducting graphene sheets and Langmuir-Blodgett films.

TLDR
It is reported that the exfoliation-reintercalation-expansion of graphite can produce high-quality single-layer graphene sheets stably suspended in organic solvents that exhibit high electrical conductance at room and cryogenic temperatures.

Reducing sugar: new functional molecules for the green synthesis of graphene nanosheets.

TLDR
It is found that GNS-based materials could be of great value for applications in various fields, such as good electrocatalytic activity toward catecholamines (dopamine, epinephrine, and norepinephrine).

Reduced graphene oxide by chemical graphitization.

TLDR
A novel reducing agent system (hydriodic acid with acetic acid (HI-AcOH) that allows for an efficient, one-pot reduction of a solution-phased RG-O powder and vapour-phasingRG-O (VRG-O) paper and thin film is reported.
...