"Tungsten dielenide?"

Xu Chuan muttered for a moment, he knew the name.

It is a typical low-dimensional transition metal chalcogenide semiconductor material, an inorganic compound with a layered structure, with good physical, chemical and electrical properties.

It is widely used in energy storage batteries, lubrication, semiconductors, photovoltaics, aerospace, aviation, military, national defense and other fields.

For example, it can be used as a cathode material for lithium-sulfur batteries, or a negative electrode material for lithium batteries, and can also be used to make transistors, photoelectrodes, single-photon emitters and other things.

At present, it is still the cutting-edge research object in the materials industry, but it will be very popular in the next ten years, and it will be common in almost every university.

It seems that his mentor's vision is indeed very good, but in his previous life, he didn't seem to have heard of his mentor researching this kind of thing, and it seems that the research should have failed.

Otherwise, it would not be possible to leave no news out.

After all, ordinary people who will be idle and talk about their failed past, aren't they all showing off what they have done?

And it is not uncommon for a new material to fail, and it is normal for funds to break, encounter unsolvable problems, run away from mentors, and poach the R&D team.

After all, there are many domestic universities, materials research institutes, materials laboratories, and material companies, even if the field of materials is very extensive, but there are only those that are valuable and popular.

Just as Chen Zhengping can see that low-dimensional materials transition metal chalcogenide compounds are a hot prospect in the future, not to mention other people who have been mixed in the materials industry all year round, they will definitely be able to see it, after all, everyone is also an old fritter.

So the competition between each other is really not small, and everyone is in a hurry when you are competing for me, or simply taking money to smash people.

For example, Zhe University, over the years, has taken money from Nanda University, and even P University and Mizuki to smash a lot of professors and laboratory personnel, and even smashed the researchers of the entire project of the other party.

It is precisely because of this that the influence of Zheda has been rising in recent years.

What's more, the material industry is really in a hurry, and the winner takes all.

If you can make the materials a month in advance, or even half a month, and successfully pass the patent release, then the latecomers will really lose no pants left, and they can't drink a sip of soup.

......

"Mentor, Xu Chuan is here."

After bringing people over, Fan Pengyue shouted Chen Zhengping, who was busy.

"Teacher." Xu Chuan also said hello here.

"Well, okay, Xu Chuan, wait a minute, I'll finish the experiment in my hand, Fan Pengyue, you take Xu Chuan to learn about our project first."

Chen Zhengping didn't raise his head, staring at the experimental equipment in front of him and replied.

"Then come with me, junior brother." Fan Pengyue smiled honestly, took Xu Chuan to visit the materials laboratory, and explained while visiting:

"The material we are working on in this project is tungsten dielenide, which is a low-dimensional material."

"Oh, I forgot to explain what low-dimensional materials are, and the so-called low-dimensional materials are materials that do not exceed the nanoscale in three dimensions, specifically two-dimensional, one-dimensional and zero-dimensional materials."

"Zero-dimensional materials, also known as quantum dots, are made up of a small number of atoms or molecules, and the size of the particles is nanometers, such as the atomic clusters of semiconductors and metals are typical zero-dimensional materials."

"One-dimensional materials are called quantum wires, and the thickness of the wires is in the nanometer range, such as carbon nanotubes and one-dimensional graphene, which are one-dimensional materials."

"Two-dimensional materials include the interface between two materials, or the thin film attached to the substrate, and the depth of the interface or the thickness of the film layer is in the nanometer range, such as metal nanoplates."

"Our tungsten diselenide is a two-dimensional material."

"Well, these concepts shouldn't be difficult for you, but for now, you just need to understand them, and you don't need to go deeper."

"At present, our main problem is how to lay tungsten dielenide on silicon oxide wafers or optical sapphire wafers with a single-atom structure, so that it can form a nanoscale monolayer structure."

"But every time I do a tiling experiment, eventually tungsten diselenide will appear......"

Fan Pengyue briefly introduced the current situation and progress of the project, and also roughly explained the knowledge of materials.

After all, if you want to solve the material math problem, it is impossible to understand the material at all.

"What does that require me to do?" Xu Chuan asked 'puzzled'.

After listening to Fan Pengyue's explanation, he already roughly knew what the problem was.

Tungsten dielenide is a typical sulfide low-dimensional material, although he has not studied it, but he has studied a lot of similar materials in his previous life.

Nanomaterials were the focus of his research in his last life.

If there is a good accident, the reason why the tiling of tungsten diselenide will have problems should be due to the eutectic effect of tungsten diselenide.

Because tungsten diselenide is an inorganic compound with a layered structure, with a hexagonal structure similar to molybdenum disulfide, each tungsten atom will bond with six selenium atoms in a triangular prism coordination mode, and each selenium atom will be bonded with three tungsten in an angular pyramid configuration.

The bond length between tungsten and selenium is 2.526, the bond length between selenium and selenium is 3.34, and the layer between layers is combined with van der Waals forces.

Generally speaking, there are many methods for the preparation of two-dimensional nanosheet materials, such as mechanical exfoliation, liquid phase exfoliation, electrochemical exfoliation, chemical vapor deposition and hydrothermal method.

Except for mechanical stripping, most of these methods are suitable for tungsten diselenide.

However, due to the presence of van der Waals, the stripped tungsten selenide nanosheets are not stable and are easy to be stacked together again by van der Waals.

This is probably the main reason why this project has always been stuck.

......

"We need to help analyze the data to see what hinders the complete crystallization of tungsten diselenide in the process of tiling, this is the content of functional analysis, I have deliberately asked Professor Zhou Hai to study for a period of time, but obviously, you know, I have almost no mathematical talent."

"So it's up to you."

"Of course, I will assist you throughout the process, and I will tell you the meaning of the data of each experiment and the corresponding experimental procedures, so that it may be faster."

Fan Pengyue sighed, neither he nor his tutor were good at functional analysis, although the tutor knew a little more than him, but he was also a mess of these maths, and he couldn't find his thoughts.

But this is normal, not everyone is as perverted as the little junior brother in front of them.

In fact, the physics department at the undergraduate level of most universities does not offer functional analysis at all, and even if you choose to take a minor, you can only go to the School of Mathematics to audit.

Therefore, physicists in the physics world are generally not good at mathematics, except for Witten and the pervert in front of him.

......