Monolayer Graphene Oxide
Order Code: M881MSDS sheet
Pre-made graphene oxide solutions will be coming on sale early 2017!
Monolayer Graphene Oxide
Monolayer graphene oxide is one of the most popular 2d materials available this is due to the wide range of fields that it can be applied to. It has a distinct advantage over other 2d materials such as graphene due to being easily dispersed within solution allowing for the processing at high concentrations. This has opened it up for use in applications such as optical coatings, transparent conductors, thin-film batteries, chemical resistant coatings, water purification, and many more.
Ossila have two types of powdered graphene oxide available with flake sizes between 1-5um and 1-50um. In addition we also offer pre-dispersed solutions of graphene oxide for simple instant use.
Graphene Oxide Powders
|Flake Size||1-5 μm||1-50 μm|
|Flake Thickness||0.8-1.2 nm||0.8-1.2 nm|
|Single layer ratio||>99%||>99%|
|Packaging Information||Light resistant bottle||Light resistant bottle|
Graphene Oxide Solutions
|Concentration||5 mg.ml-1||0.5 mg.ml-1||5 mg.ml-1||0.5 mg.ml-1|
|Flake Sizes||1-5 μm||1-5 μm||1-50 μm||1-50 μm|
||4 x 25 ml bottles||4 x 25 ml bottles||4 x 25 ml bottles||4 x 25 ml bottles|
Graphene oxide, also referred to as graphite/graphitic oxide, is obtained by treating graphite with oxidisers, and results in a compound of carbon, oxygen, and hydrogen in variable ratios.
The structure and properties of graphene oxide are much dependent on the particular synthesis method and degree of oxidation. With buckled layers and an interlayer spacing almost two times larger (~0.7 nm) than that of graphite, typically it still preserves the layer structure of the parent graphite.
Graphene oxides absorb moisture proportionally to humidity and swell in liquid water. Graphene oxide membranes are vacuum tight and impermeable to nitrogen and oxygen, but are permeable to water vapours. The ability to absorb water by graphene oxides again, depends on the particular synthesis method and also shows a strong temperature dependence.
Graphene oxide is considered as an electrical insulator for the disruption of its sp2 bonding networks. However by manipulating the content of oxygen-containing groups through either chemical or physical reduction methods, the electrical and optical properties of graphene oxides can be tuned dynamically. To increase the conductivity, oxygen groups are removed by reduction reactions to reinstall the delocalised hexagonal lattice structure. One of the advantages of graphene oxides over graphene is that they can be easily dispersed in water and other polar organic solvents. In this way, graphene oxide can be dispersed in a solvent and reduced in situ, resulting in potentially monodisperse graphene particles.
Due to it unique structure, graphene oxides can be functionalised in many ways for desired applications, such as, optoelectronics, drug delivery, chemical sensors, membrane filtration, flexible electronics, solar cell and more.
Graphene oxide was first synthesised by Brodie in 1859, followed by Hummers' Method in 1957 and Staudenmaier and Hofmann methods. Graphite (graphene) oxide has also been prepared by using a "bottom-up" synthesis method (Tang-Lau method) in which glucose is the sole starting material. Tang-Lau method process is considered to be easier, cheaper, safer and more environmentally friendly. Besides, the thickness, ranging from monolayer to multilayers can by adjusted by engaging Tang-Lau process. The effectiveness of an oxidation process is often evaluated by the carbon/oxygen ratios of the graphene oxide.
Due to the presence of oxygen and hydroxide groups on graphene oxide the dispersibility of this material is significantly better than other 2d materials such as reduced graphene oxide, or graphene. High concentrations of graphene oxide can be dispersed in polar solvents such as water, at Ossila we have found that the most stable solutions can be found using the following recipe:
- Weigh out desired amount of material, can go up to at least 5 mg.ml-1.
- Add 1:1 ratio of deionized water to isopropyl alcohol.
- Vigorously shake to break up material.
- A short treatment in an ultrasonic bath will rapidly disperse the material.
- For larger flakes use a mechanical agitator instead as sonication may damage the flakes.
|CAS number||7782-42-5 (graphite)|
|Recommended Solvents||H2O, DMF, IPA (form a dispersion, not a solution)|
|Synonyms||Single layer graphene oxide, Graphene oxide, GO|
|Classification / Family||
2D semiconducting materials, Carbon nanomaterials, Graphene oxide, Graphene, Organic electronics
- An improved Hummers method for eco-friendly synthesis of graphene oxide, J. Chen et al., Carbon 64, 225-229 (2013); http://dx.doi.org/10.1016/j.carbon.2013.07.055.
- Synthesis of few-layered, high-purity graphene oxide sheets from different graphite sources for biology, D. A. Jasim et al., 2D Mater. 3, 014006 (2016); doi:10.1088/2053-1583/3/1/014006.
- Preparation and Characterization of Graphene Oxide, J. Song et al., J. Nanomater., 276143 (2014); http://dx.doi.org/10.1155/2014/276143.
- The chemistry of graphene oxide, D. R. Dreyer et al., Chem. Soc. Rev., 39, 228–240 (2010); DOI: 10.1039/b917103g.
- Preparation of small-sized graphene oxide sheets and their biological applications, M. Zhang et al., J. Mater. Chem. B, 4, 121 (2016); DOI: 10.1039/c5tb01800e.
- Graphene Oxide: Preparation, Functionalization, and Electrochemical Applications, D. Chen et al., Chem. Rev., 112, 6027−6053 (2012); dx.doi.org/10.1021/cr300115g.
- Preparation of Graphitic Oxide, W. Hummer et al., J. Am. Chem. Soc., 80 (6), 1339–1339 (1958); DOI: 10.1021/ja01539a017.
- Preparation and characterization of graphene oxide, D. A. Dikin et al., Nature 448, 457-460 (2007); doi:10.1038/nature06016.
- Improved Synthesis of Graphene Oxide, D. C. Marcano et al., ACS Nano, 4 (8), 4806–4814 (2010); DOI: 10.1021/nn1006368.
- Fast and fully-scalable synthesis of reduced graphene oxide, S. Abdolhosseinzadeh et al., Sci. Rep., 5:10160 (2015); DOI: 10.1038/srep10160.
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.