Views: 0 Author: Site Editor Publish Time: 2022-05-02 Origin: Site
Graphene Photonic Sensor
Graphene could also appear in the larger market in the form of photonic sensors that detect information carried in optical fibers, a role that is still being filled by silicon, but the era of silicon seems to be coming to an end.
IBM research team has revealed their graphene photodetector for the first time, and the next thing to expect is graphene-based solar cells and liquid crystal displays.
Because graphene is transparent, electrical panels made with it have better light transmittance than other materials.
Graphene
Graphene is a two-dimensional atomic-scale, hexagonal carbon allotrope with one atom at each vertex.It can also be thought of as an indefinitely large aromatic molecule, the final case for the family of planar PAHs.
Preparation method of graphene
The principle of the solvent exfoliation method is to disperse a small amount of graphite in a solvent to form a low-concentration dispersion liquid, and use the action of ultrasonic waves to destroy the van der Waals force between the graphite layers.
At this time, the solvent can be inserted between the graphite layers,Layer-by-layer exfoliation to obtain graphene.
This method does not destroy the structure of graphene like the oxidation-reduction method, and can prepare high-quality graphene.
The highest yield of graphene (approximately 8%) was found in nitrogen methyl pyrrolidone and conductivity is 6500S/m .
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