What question did this study set out to answer?

To establish and optimize a scalable method for exfoliating bulk graphite into defect-free graphene sheets suspended in surfactant-water solutions.

February 19, 2009Journal of the American Chemical Society

Liquid Phase Production of Graphene by Exfoliation of Graphite in Surfactant/Water Solutions

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Authors

MLMustafa Lotya YHYenny Hernández PKPaul J. King

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Overview

Experimental study demonstrates surfactant-assisted liquid-phase exfoliation of graphite into defect-free graphene flakes, suggesting a scalable route for producing low-cost transparent conductors.

Key Points

To establish and optimize a scalable method for exfoliating bulk graphite into defect-free graphene sheets suspended in surfactant-water solutions.
Exfoliated and dispersed graphite in aqueous surfactant solutions, optimizing dispersion quality through optical characterization.
Analyzed flake thickness, defect density, and structure using transmission electron microscopy (TEM), atomic resolution TEM, Raman spectroscopy, infrared spectroscopy, and X-ray photoelectron spectroscopy.
Fabricated thin conductive films by vacuum filtration and deposited individual flakes onto mica via spray coating for statistical size analysis.
Transmission electron microscopy revealed that over 40% of dispersed flakes contained fewer than 5 layers, with approximately 3% being defect-free monolayers.
Coulomb repulsion from adsorbed surfactant stabilized flakes against reaggregation according to DLVO theory, though larger flakes sedimented out after approximately 6 weeks.
Vacuum-filtered films were semitransparent, electrically conductive, and largely devoid of structural defects, showing only minor oxide populations.

Cite This Study

Lotya et al. (2009) studied this question.

synapsesocial.com/papers/69dbb7453e67f8d13868487c https://doi.org/10.1021/ja807449u

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February 19, 2009Journal of the American Chemical Society

Liquid Phase Production of Graphene by Exfoliation of Graphite in Surfactant/Water Solutions

View Full Paper

Ask AI

Bookmark

Authors

MLMustafa Lotya YHYenny Hernández PKPaul J. King

Discussion

Member takes

Overview

Experimental study demonstrates surfactant-assisted liquid-phase exfoliation of graphite into defect-free graphene flakes, suggesting a scalable route for producing low-cost transparent conductors.

Key Points

To establish and optimize a scalable method for exfoliating bulk graphite into defect-free graphene sheets suspended in surfactant-water solutions.
Exfoliated and dispersed graphite in aqueous surfactant solutions, optimizing dispersion quality through optical characterization.
Analyzed flake thickness, defect density, and structure using transmission electron microscopy (TEM), atomic resolution TEM, Raman spectroscopy, infrared spectroscopy, and X-ray photoelectron spectroscopy.
Fabricated thin conductive films by vacuum filtration and deposited individual flakes onto mica via spray coating for statistical size analysis.
Transmission electron microscopy revealed that over 40% of dispersed flakes contained fewer than 5 layers, with approximately 3% being defect-free monolayers.
Coulomb repulsion from adsorbed surfactant stabilized flakes against reaggregation according to DLVO theory, though larger flakes sedimented out after approximately 6 weeks.
Vacuum-filtered films were semitransparent, electrically conductive, and largely devoid of structural defects, showing only minor oxide populations.

Cite This Study

Lotya et al. (2009) studied this question.

synapsesocial.com/papers/69dbb7453e67f8d13868487c https://doi.org/10.1021/ja807449u

Also Consider

Synapse has enriched one closely related paper. Consider it for comparative context:

1Synthesis of Water Soluble Graphene2008 · 2,725 citations

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