Description

Few Layers Graphene Dispersion in Water

Graphene is the name of one of the allotropes of carbon. In graphite (another allotrope of carbon), each tetravalent carbon atom is connected to three other carbon atoms by three covalent bonds and forms an extensive network. This layer itself is placed on a completely similar layer and in this way, the fourth valence electron has also given a chemical bond. But the fourth electron bond is a van der Waals bond, which is a weak bond. For this reason, the layers of graphite easily overlap and can be used in the tip of a pencil. Graphene is a material in which there is only one of these graphite layers, and in other words, the fourth bonded electron of carbon remains as a free electron.

Graphene applications can be mentioned as follows:

1.Use instead of carbon fibers in composites that create light aircraft and satellites

2.Use instead of semiconductor silicon in transistors

3.Embedding graphene in plastic that can make said plastic conductive

4.The possibility of increasing the durability of batteries by using graphene dust

5.Application in optoelectronics

6.Creating harder, stronger and lighter plastics

7.Application as transparent conductive coating for solar cells and displays

8.Creating more efficient wind turbines

9.Creating stronger implants (medical)

10.Application in sports equipment

11.Creation of supercapacitors

12.Application for development on touch screens

13.Application in LCD and OLEDs

In the figure below, you can see the XRD diagram and Raman spectroscopy for the dispersion product of multilayer graphene oxide in water.

Single or few-layer graphene can be obtained from high purity graphite by breaking the bonds that hold together the graphene sheets. This can be done by using either a chemical or a mechanical approach.

In the figure below, you can see the SEM image for the dispersion product of multilayer graphene oxide in water.

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Thanks, from Dear Naghmeh Gholamalizadeh for this article:

https://graphenika.com/articles/Efficient and Direct Exfoliation of High-Quality Graphene Layers in Water from Different Graphite Sources and Its Electrical Characterization/