Des chercheurs de l’Ulsan National Institute of Science and Technology (Unist, Corée du Sud) ont mis au point une méthode qui permet de produire un graphène tout simplement… parfait ! © Alex, Adobe Stock

This graphene is simply … perfect!

In life, nothing is perfect. Or it could be the image of graphene that researchers have just received. Without “islands” or folds or cracks, this will pave the way for new applications.

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The Graphene. Antivox has been the talk of the town in recent weeks. It will enter the mix Govt anti-vaccines. But enough buzz. Today this “miracle” object is back in front of the stage very seriously. Researchers fromUlsan National Institute of Science and Technology (Unist, South Korea) They announced that they have successfully developed an incredibly pure single crystal graphene over a large area. Perfect graphene!

The team produced images of monocrystalline graphene that do not already have these small “islands” made of second-layer materials. Cu (111) was in the sheets using methane (CH)4) And at a temperature of about 1,320 Kelvin (K) – slightly below 1,050 C. But these graphene pictures still contain folds and cracks. They formed when the material was brought back Ambient temperature And reduced its effectiveness.

At this point, the researchers were able to eliminate these shortcomings. The folds in question in the experiments formed at least 1.020 K. Physicists Cu-Ni (111) sheets and tried to grow graphene chemically at different temperatures around this threshold. They found that it worked properly between 1,000 and 1,030 K. The graphene thus produced showed remarkable efficacy. Proof of completeness!

A forward for science and applications

Researchers also emphasize the simplicity of their method. Each Cu-Ni (111) sheet can produce two at once Images of graphene – One on each page – It can be deleted in a minute. Cu-Ni (111) paper, for its part, can be used multiple times. After five cycles of growth, it loses only 0.0001 g.

Using the transmission electron microscope, researchers were even able to identify the causes of folds in graphene images. The lack of adherence in the regions began “Walking Margin” Between the Cu-Ni (111) plates of monocrystalline. From “Step margins” It appears to be accurate at a temperature of about 1,030 K.

The production of such perfect graphene images makes it possible to easily imagine high-performance integrated devices in any direction.The whole thing. These monocrystalline graphene films have to prove that they are important not only for new advances in basic science but also for new applications in electronics, photonics, mechanics, heat and other fields.

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