Flexible, transparent, conducting films of randomly stacked graphene from surfactant-stabilized, oxide-free graphene dispersions.

  title={Flexible, transparent, conducting films of randomly stacked graphene from surfactant-stabilized, oxide-free graphene dispersions.},
  author={Sukanta De and Paul J. King and Mustafa Lotya and Arlene O’Neill and Evelyn M. Doherty and Yenny Hern{\'a}ndez and Georg S. Duesberg and Jonathan N. Coleman},
  volume={6 3},
Graphite is exfoliated in water to give dispersions of mono- and few-layer graphene stabilized by surfactant. These dispersions can be used to form thin, disordered films of randomly stacked, oxide-free, few-layer graphenes. These films are transparent with a direct current conductivity of up to 1.5 x 10(4) S m(-1). The conductivity is stable under flexing for at least 2000 cycles. The electrical properties are limited by disorder and aggregation suggesting future routes for improvement. 

Figures from this paper

Transparent conducting films from NbSe3 nanowires

Methods to disperse and partially size separate NbSe(3) nanowires in aqueous surfactant solutions can easily be formed into thin films, and films thinner than ∼ 70 nm displayed reduced DC conductivity due to percolative effects.

Graphene nanosheets deposited on polyurethane films by self-assembly for preparing transparent, conductive films

This study prepared graphene nanosheet (GNS)-based transparent, conductive films (TCFs) by a self-assembly method. We used the water-borne polyurethane (WPU, with sulfonate functional groups) film as

A hybrid reduction procedure for preparing flexible transparent graphene films with improved electrical properties

We introduce a novel procedure for producing flexible transparent conductive graphene films. The synthetic procedure includes a solution-processed chemical reduction and an anodized aluminum oxide

The importance of repulsive potential barriers for the dispersion of graphene using surfactants

We have dispersed graphene in water, stabilized by a range of 12 ionic and non-ionic surfactants. In all cases, the degree of exfoliation, as characterized by flake length and thickness, was similar.

Synthesis and characterization of electrically conductive polyethylene-supported graphene films

The experimental results suggest that the semiconducting behavior observed at low temperature can be described in the framework of the Efros-Shklovskii variable-range-hopping model.

High-quality thin graphene films from fast electrochemical exfoliation.

A simple and fast electrochemical method to exfoliate graphite into thin graphene sheets, mainly AB-stacked bilayered graphene with a large lateral size, which exhibit ultratransparency and sheet resistance superior to those based on reduced graphene oxide or graphene sheets by other exfoliation methods are demonstrated.

Graphene as Transparent Electrode Material for Organic Electronics

This work isolated graphene by repeatedly peeling highly oriented pyrolytic graphite (HOPG) using sticky tape with high crystallographic quality and ballistic electron transport on the micrometer scale with only 2.3% of light absorption.

Conductive graphene-based macroscopic membrane self-assembled at a liquid–air interface

Free-standing graphene-based macroscopic membranes, which are characterized by a layered structure and tunable conductivity, are prepared by a self-assembly process at a liquid–air interface. Since

Graphene Films Using a Thermally Curable Surfactant

Those surfactants which are easily synthesized, eco‐friendly, low cost, and able to produce high yields of graphene are crucial for large‐scale graphene manufacture and targeted applications of



Evaluation of solution-processed reduced graphene oxide films as transparent conductors.

These experiments demonstrate solution-processed GO films have potential as transparent electrodes and sheet resistance and optical transparency using different reduction treatments.

Highly conducting graphene sheets and Langmuir-Blodgett films.

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.

Improved conductivity of transparent single-wall carbon nanotube thin films via stable postdeposition functionalization

A simple postdeposition method for improving the conductivity of transparent and conducting single-wall carbon nanotube (SWNT) thin films via exposure to nitric acid and thionyl chloride is reported.

Effect of acid treatment on carbon nanotube-based flexible transparent conducting films.

Flexible transparent conducting films with sodium dodecyl sulfate-dispersed singlewalled carbon nanotubes (SWCNTs) were prepared by a spray method and were further immersed in various acids to improve the cross-junction resistance between SWCNT networks and enhanced metallicity of SWC NTs.

Transparent and conducting electrodes for organic electronics from reduced graphene oxide

The deposition and optoelectronic properties of reduced graphene oxide thin films are described. Thin films with thicknesses ranging from 1–10nm have been deposited by the vacuum filtration method.

Transparent, conductive graphene electrodes for dye-sensitized solar cells.

Transparent, conductive, and ultrathin graphene films, as an alternative to the ubiquitously employed metal oxides window electrodes for solid-state dye-sensitized solar cells, are demonstrated and show high chemical and thermal stabilities and an ultrasmooth surface with tunable wettability.

Organic solar cells with solution-processed graphene transparent electrodes

We demonstrate that solution-processed graphene thin films can serve as transparent conductive anodes for organic photovoltaic cells. The graphene electrodes were deposited on quartz substrates by

Colloidal suspensions of highly reduced graphene oxide in a wide variety of organic solvents.

It is reported that homogeneous colloidal suspensions of chemically modified graphene sheets were readily produced in a wide variety of organic solvent systems and "paperlike" materials generated by very simple filtration of the reduced graphene oxide sheets had electrical conductivity values as high as 16,000 S/m.

Percolation in transparent and conducting carbon nanotube networks

Ultrathin, uniform single-walled carbon nanotube networks of varying densities have been fabricated at room temperature by a vacuum filtration method. Measurements of the sheet conductance as a