Scholar’s Advanced Technological System

Jinling Institute of Advanced Studies.

Institute of Computational Materials.

With Lu Zhou came to the lab, Yang Xu, who was sitting in front of the computer and called up the test data, said with a look of emotion.

"It is incredible..."

Lu Zhou did not ask where it was incredible, but went straight to the question: "What material is that thing?"

"Silver," Yang Xu took a deep breath. "Accurately, it is silver and graphene!"

"Silver and graphene?" Looking at Yang Xu, Lu Zhou was surprised: "Just this?"

In the impression, he seems to have seen similar papers.

It's just because there is not much research on metal materials, and I can't remember where I saw it.

To be honest, when he heard only these two materials, he was still a little disappointed. Although he also knows that even a higher civilization probably won't build costs on a wire, he didn't expect it to be so ordinary.

However, Yang Xu looked at him silently.

"Is it awesome to scream on these two?"

Saying, as if to prove this, he tapped a few buttons on the keyboard.

Soon, a TEM image is presented on the screen.

I saw that on the image, the black and gray plaques were interlaced, and a neat and delicate texture was interwoven in the two-dimensional space of the plane, revealing the secret of the nano-scale in the silver wire. come out.

Pointing at a few key areas on the image, Yang Xu did not explain much. He continued to speak. "Look at these places and you will know."

Leaning closer to the computer screen, Lu Zhou looked in the direction of his index finger.

Only a silver atomic group having a particle diameter of about 1-5 nm and an approximately spherical shape was observed, and a single layer of graphene similar in lateral dimension was bonded together.

Soon, Lu Zhou’s eyebrows wrinkled slightly.

Even if there is not much research on metal materials, he can see the unusual things.

This is not a problem that is not so good.

But do not do the problem...

The production of graphene alloys based on metal materials requires bonding between metal nanoparticles and graphene.

At present, only the cold metal powder metallurgy technology can be achieved, but even powder metallurgy technology can not bond graphene and silver nanoparticles to such a perfect degree.

It is no exaggeration to say that the slender silver wire is just a piece of art.

Seeing Lu Zhou did not speak, Yang Xu continued with a feeling of emotion.

"The frontier of powder metallurgy is relatively unpopular. I don't know much about this piece. But with 3D printing technology as an example, the best metal powder is about 10,000 mesh, and the conversion is almost 13 micron. Some nanometers. The powder used in ceramic materials may be finer, but also on the micron scale."

“Although some laboratories can do ultra-fine grinding at 20nm and below...but this powder is almost impossible to store under normal conditions, let alone to bond with graphene crumbs.”

Not only is it difficult to prepare, it is difficult to screen, and it is more difficult to save.

The higher the mesh size of the metal powder, the smaller the particle size, the easier it is to oxidize, and the agglomeration phenomenon is extremely likely to occur.

The only two problem-solving ideas that seem to work are either to disperse it in a special way while smelting, or to mix it directly with graphene crumbs while producing the powder. On the substrate.

Leaning on the chair, Yang Xu sighed.

“As you can see, this is not the technology itself, but the realization of the production process. In fact, the papers on composite materials such as ag/gf, ag/go, agfe/rgo, because of electronics The rapid development of the industry can be said to be endless a few years ago."

“For example, indium tin oxide for making mobile phone screens has fragile properties, and many scholars have proposed combining silver nanowires with graphene to develop a new generation of flexible flexible screens. According to limited experimental data, this The mechanical properties of the materials are quite excellent, and the electrical resistivity is much lower than that of the general metal... When I was a postdoctoral fellow at MIT, there was a laboratory there to do this research."

Moving away from the screen, Lu Zhou asked: "What later?"

Yang Xu shrugged: "I don't know, but I guess most of the projects can't go on. Indium tin oxide is not cheap, but silver is better. Even if this technology is made, most people will not use it."

Thinking of this, Lu Zhou's expression is a bit strange.

If using silver as a mobile phone screen is considered extravagant, then what is the use of silver as a wire?

But I think that if you can do it in space travel, space mining is probably not a difficult thing, and Lu Zhou is relieved.

For a civilization with this technology, the value of silver may be a little more expensive than copper.

Looking at the data on the computer screen, Yang Xu's eyes were filled with curious look.

After hesitating, he finally couldn’t help but ask, "Where did you get this thing?"

The feeling is the same as Lu Zhou.

In his opinion, the silver wire of the length of the thumb is like a piece of art!

It is no exaggeration to say that its existence has subverted the industry's perception of metallurgical technology.

However, Lu Zhou did not answer his confusion. He simply replied: "National secrets, you can only help me to do the reverse. Other things know that it is not good for you."

Lu Zhou did not explain this question too much because there was no such necessity at all.

Even before the Lingyun Medal, he does not need to explain anything to anyone.

Or to retreat 10,000 steps, even if he needs to explain anything, it is enough to explain to one person.

And this kind of thing will only happen in one situation.

That is his behavior, which seriously jeopardizes national security.

In addition, it is no exaggeration to say that even those responsible for his security work, those responsible for keeping him secret, have no right to investigate the "secret" itself.

However, when he saw the surprise of Yang Xu, Lu Zhou’s heart was secretly glad.

Fortunately, he only cut a small sample down.

If you let this guy know that he still has a bunch of things, I don't know if he will be shocked to doubt life.

"Ok……"

Reluctantly shrugged, Yang Xu reluctantly accepted this perfunctory statement.

If it involves confidentiality, knowing too much is really not good for him.

After a pause, Yang Xu continued.

"But it's not easy to reverse this stuff. At least I can't think of it for a while, how can I make this thing?"

Lu Zhou: "If you relax silver nanoparticles to the micron level?"

Yang Xu hesitated and said: "The difficulty still exists, but if you are interested, we can try it. But..."

Lu Zhou: "But?"

“But does this make sense?” Yang Xu asked. “Although I admit that the resistivity of this kind of ag/gf material is excellent, considering its price, the industrial application prospect is almost zero.”

It took a lot of effort to understand the mystery, and at most it can only produce a "beautiful" paper.

This kind of thing may be of interest to general researchers, but for Lu Zhou and Yang Xu, the meaning is not significant.

After all, unlike mathematical physics, materials science itself is a discipline based on application...

For this problem of Yang Xu, Lu Zhou also thought for a long time.

To be honest, his heart is also hesitant, whether there is any value in recycling this technology.

However, in the end, Lu Zhou made up his mind in his heart and said.

"I can't answer your question, at least I can't answer it now."

"But intuition tells me that it is worth it."