GRAPHENE FLOWER is a graphene directly synthesized based on InALA process (high rate CVD method) as the original process of our company, using a bottom-up system
Compared with graphite, graphene has large van der Waals force. Therefore, its particles are likely to cohere and adhere with each other, and tend to return to graphite. Accordingly, it should be avoided to crush and classify under dry condition while keeping the condition of graphene.
Figure: Appearance of GRAPHENE FLOWER immediately after synthesis (left) and after the particles have adhered with each other (right)
In InALA process of our company, graphene is prepared independently while preventing the pieces from adhering with each other. Successively, a piece of graphene is crushed in a solvent while preventing the particles from adhering with each other, and each piece of graphene is dispersed in a solvent. The product made by dispersing each piece of graphene in the solvent is the GRAPHENE FLOWER dispersion liquid.
Graphene in a dispersion liquid is trapped on a filter (micro grid). The part surrounded with a red circle is graphene.
The transmission electron microscope (TEM) photograph of the edge of the graphene shown in the left figure. It can be judged from the lattice image of graphene that it has seven layers of laminations and thickness of 2.1 nm
Control of the dimension of graphene is possible!
Since Graphene Flower is the directly synthesized graphene based on bottom-up system, it is possible to control the dimension and thickness of the graphene by controlling reaction conditions. When graphene is likened to cherry blossoms, the growth degree of flowers from just beginning to open to reaching full bloom can be realized by controlling the parameters such as reaction time and temperature.
Figure: Correlation between the dimension and thickness of Graphene Flower
* Abscissa axis is the dimension of graphene (length of the long side when a rectangle is supposed)
* Vertical axis is the number of laminations of graphene
This is an example of the specifications of Graphene Flower.
|Solvent type||water + Surfactant|
|IPA , 2-Methoxyethanol|
|PGMEA (1- Methoxy-2-propyl acetate),|
|Concentration(mg/ml)||0.1, 0.5, 1.0||Gravimetric method|
|Graphene Dimension(μm)||0.1〜10, 10<||FE-SEM, FE-TEM|
|Graphene Thickness(nm)||1〜3, 5 <||Raman, FE-TEM|
An example of specifications for Graphene Flower dispersion liquid
Specifications for Graphene Flower dispersion liquid: Please refer to the price in this page.