Conductive thin films of pristine graphene by solvent interface trapping.

  title={Conductive thin films of pristine graphene by solvent interface trapping.},
  author={Steven J. Woltornist and Andrew J. Oyer and Jan Michael Carrillo and Andrey V. Dobrynin and Douglas H. Adamson},
  journal={ACS nano},
  volume={7 8},
Graphite's insolubility in conventional solvents is a major obstacle to its utilization. This challenge is typically addressed by chemical modification such as oxidation, followed by reduction. However, pristine graphene possesses superior properties as oxidation and reduction lead to degradation of the graphene. Here we demonstrate the use of an interfacial trapping technique to assemble laterally macroscopic films of pristine graphene that are up to 95% transparent. This is accomplished by… 

Figures from this paper

Pristine Graphene as a Two-Dimensional Surfactant

Graphene, with its outstanding electrical, mechanical, and thermal properties, has been the focus of much attention since it was the topic of the 2010 Nobel Prize. Current methods to produce graphene

Polymer/Pristine Graphene Based Composites: From Emulsions to Strong, Electrically Conducting Foams

The unique electrical, thermal, and mechanical properties of graphene make it a perfect candidate for applications in graphene/graphite based polymer composites, yet challenges due to the lack of

Self-assembled graphene composites for flow-through filtration.

This system provides a continuous approach to water treatment rather than a batch approach, and uses pristine graphene instead of the more costly and environmentally challenging graphene oxide, providing a convenient route to clean the filters by resistive heating.

Pristine Graphene Microspheres by the Spreading and Trapping of Graphene at an Interface.

The interfacial spreading and exfoliation of graphene was used to create low-density, hollow microspheres defined by a thin shell of graphene, which acted as a 2D surfactant to stabilize the dispersed water droplets utilized as polymerization templates.

Properties of Pristine Graphene Composites Arising from the Mechanism of Graphene-Stabilized Emulsion Formation

Inexpensive, strong, and electrically conductive pristine graphene composites are synthesized from graphene-stabilized emulsions. These materials do not utilize oxidized graphite (GO) or reduced

Enhanced sheet conductivity of Langmuir–Blodgett assembled graphene thin films by chemical doping

We demonstrate a facile fabrication technique for highly conductive and transparent thin graphene films. Sheet conductivity of Langmuir–Blodgett assembled multi-layer graphene films is enhanced

Effect of aqueous anions on graphene exfoliation.

The observed phenomenon not only results in the improved stability of graphene stabilized emulsions, but also a low cost and environmentally friendly way of enhancing the production of graphene is offered.

Self-assembly of a thin highly reduced graphene oxide film and its high electrocatalytic activity

The controllable formation of a stable rGO film on various solid substrates has potential applications for nanoelectronics and sensors/biosensors and electrochemical sensing.



Processable aqueous dispersions of graphene nanosheets.

It is reported that chemically converted graphene sheets obtained from graphite can readily form stable aqueous colloids through electrostatic stabilization, making it possible to process graphene materials using low-cost solution processing techniques, opening up enormous opportunities to use this unique carbon nanostructure for many technological applications.

Wettability and surface free energy of graphene films.

Graphene sheets produced through chemical exfoliation of natural graphite flake and hydrazine conversion are found to be hydrophilic and hydrophobic, and isolated graphene layers seem more difficult to wet in comparison to graphite, and low adhesion work was found in the graphene-liquid interface.

Large-scale pattern growth of graphene films for stretchable transparent electrodes

The direct synthesis of large-scale graphene films using chemical vapour deposition on thin nickel layers is reported, and two different methods of patterning the films and transferring them to arbitrary substrates are presented, implying that the quality of graphene grown by chemical vapours is as high as mechanically cleaved graphene.

Graphene oxide sheets at interfaces.

It is reported that GO is an amphiphile with hydrophilic edges and a more hydrophobic basal plane, and the ease of its conversion to chemically modified graphene could enable new opportunities in solution processing of functional materials.

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

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.

Roll-to-roll production of 30-inch graphene films for transparent electrodes.

The roll-to-roll production and wet-chemical doping of predominantly monolayer 30-inch graphene films grown by chemical vapour deposition onto flexible copper substrates are reported, showing high quality and sheet resistances superior to commercial transparent electrodes such as indium tin oxides.

Structural evolution during the reduction of chemically derived graphene oxide.

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.

Three-dimensional self-assembly of graphene oxide platelets into mechanically flexible macroporous carbon films.

The self-assembly of chemically modified graphene platelets into a complex 3D morphology was achieved by the “breath-figure” method, which is a straightforward procedure for synthesizing large-area porous polymer films.

Preparation and characterization of graphene oxide paper

Graphene oxide paper is reported, a free-standing carbon-based membrane material made by flow-directed assembly of individual graphene oxide sheets that outperforms many other paper-like materials in stiffness and strength.

A novel approach to create a highly ordered monolayer film of graphene nanosheets at the liquid-liquid interface.

Interfacial self-assembly of these nanosheets demonstrates a promising route for the application of this novel material in optoelectronics applications.