Graphene is an extremely popular material within scientific research. When a simple method of exfoliating single layers of graphene from bulk graphite was discovered in 2004, it marked the start of the 2D materials era.
The properties of single layers were found to be drastically different from those of the bulk material. Many of these properties exceeded those of any known material. Today, graphene is still proving to be one of the most exciting materials around. Since the start of 2018, there have already been 27,000 publications on graphene worldwide.
Ossila provides several forms of graphene powder - including monolayer flakes, multilayer flakes, and nanoplatelets. Each of these powders can be dispersed using our recommended solvents or dispersion guides for quick use.
We have a range of different graphene powders for sale including monolayer graphene (M901), multilayer graphene (M911/M912), and graphene nanoplatelets (M941). These materials come packed as dry powders and ready for re-dispersion within the users solvent of choice.
*For larger orders please email us to discuss prices
What is Graphene?
Graphene is a hexagonal lattice of carbon atoms that spread to form a single sheet in 2 dimensions. There is no limit to the size that graphene sheets can become. The existence of graphene has been well-known for a long time, with TEM images of multi-layer graphene structures being taken as early as the 1940's. However, research into this material only properly began in 2004, when a simple method for isolating single layers of graphene was discovered. Graphene is the constituent material of several forms of carbon materials - including graphite, carbon nanotubes, and fullerenes.
Initial work on graphene showed that its properties vastly exceeded those of the bulk graphite that it was taken from. Properties such as the strength showed that a single layer of the material was over 200 times stronger than steel; the mobility of both holes and electrons were comparable to that of bulk metals such as copper; the thermal conductivity is so high as to be considered ballistic without impedance from the material itself; and single layers have a high opacity with over 2% of light at the near infrared being absorbed.
All of these unique properties mean that graphene could find use in a wide variety of applications including electrochemical capacitor devices, anti-corrosion coatings, composite materials, transparent conducting films, thermal pastes, as well as sensing and biosensing applications.
Graphene is hydrophobic, making it difficult to create stable dispersions in most solvents. At Ossila, we have found that the most stable dispersions can be produced using the following recipe:
- Weigh out desired amount of graphene powder, can go up to 0.1 mg.ml-1.
- Add 3:2 ratio of isopropyl alcohol to ethylene glycol.
- Shake vigorously to break up material.
- A 2 hour treatment in an ultrasonic bath will homogeneously disperse the material (40 kHz, 100 W ultrasonic bath).
|Recommended Solvents||H2O, N-Methyl-2-pyrrolidone (NMP), Ethanol, IPA, Ethylene Glycol|
|Synonyms||Single-layer graphene, graphene, graphene monolayer, graphene nanoplatelets|
|Classification / Family||2D semiconducting materials, Carbon nanomaterials, Graphene Oxide, Graphene and Graphene Oxide, Nanomaterials, Polycyclic aromatic hydrocarbons, OLEDs, Organic photovoltaics (OPV), Organic electronics.|
- Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene, C. Lee et al., Science, 18 (321):5887, 385-388 (2008); DOI: 10.1126/science.1157996.
- The rise of graphene, A. K. Geim et al., Nat. Mater., 6, 183 - 191 (2007); doi:10.1038/nmat1849.
- Graphene-based composite materials, S. Stankovich et al., nature, 442, 282-286 (2006); doi:10.1038/nature04969.
- The electronic properties of graphene, A. H. Castro Neto et al., Rev. Mod. Phys. 81, 109 (2009); DOI:http://dx.doi.org/10.1103/RevModPhys.81.109.
- Large-scale pattern growth of graphene films for stretchable transparent electrodes, K-S. Kim et al., Nature 457, 706-710 (2009); doi:10.1038/nature07719.
- Graphene: Status and Prospects, A. K. Geim, Science 19 (324):5934, 1530-1534 (2009); DOI: 10.1126/science.1158877.
- Graphene-Based Ultracapacitors, M. D. Stoller et al., Nano Lett., 8 (10), 3498–3502 (2008); DOI: 10.1021/nl802558y.
- Things you could do with graphene, Nat. Nanotech., 9, 737 (2014); doi:10.1038/nnano.2014.245
Mechanical reinforcement and thermal conductivity in expanded graphene nanoplatelets reinforced epoxy composites, S. Chatterjee et al., Chem. Phys. Lett., 531, 6–10 (2012); doi:10.1016/j.cplett.2012.02.006.
- Optically Transparent Cathode for Dye-Sensitized Solar Cells Based on Graphene Nanoplatelets, L. Kavan et al., ACS Nano, 5 (1), 165–172 (2011); DOI: 10.1021/nn102353h.
- Graphene Nanoplatelets Outperforming Platinum as the Electrocatalyst in Co-Bipyridine-Mediated Dye-Sensitized Solar Cells, L. Kavan et al., Nano Lett., 11 (12), 5501–5506 (2011); DOI: 10.1021/nl203329c.
- Electrochemistry of graphene: new horizons for sensing and energy storage, M. Pumera, Chem. Rec., 9(4), 211-223 (2009); DOI: 10.1002/tcr.200900008.
- Enhancing the thermal, electrical, and mechanical properties of silicone rubber by addition of graphene nanoplatelets, Y. Song et al., Mater. & Design, 88, 950-957 (2015); doi:10.1016/j.matdes.2015.09.064.
- Chemical Mass Production of Graphene Nanoplatelets in ∼100% Yield, A. M. Dimiev et al., ACS Nano, 10 (1), 274–279 (2016); DOI: 10.1021/acsnano.5b06840.
- Enhancement of fracture toughness, mechanical and thermal properties of rubber/epoxy composites by incorporation of graphene nanoplatelets, F. Wang et al., Composites: Part A, 87, 10–22 (2016); doi:10.1016/j.compositesa.2016.04.009.
- Characterization of Graphene-Nanoplatelets Structure via Thermogravimetry, M, Shtein et al., Anal. Chem., 87 (8), 4076–4080 (2015); DOI: 10.1021/acs.analchem.5b00228.
To the best of our knowledge, the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.