Hanging up the phone, Xu Chuan quickly rushed to the material research and development building.

As soon as I came to the building, I saw Fan Pengyue, the senior brother waiting downstairs.

Seeing him coming, the senior brother quickly greeted him, with a bright and happy smile on his face.

"Little junior brother, your previous speculation was right, through experiments, we found that the concentration of hydrogen reducing agent is indeed too high, and it is not the optimal ratio, so that to a certain extent, it even interferes with the generation of tungsten diselenide nanosheets."

"And the mathematical model you brought over the afternoon before yesterday has also passed the calculation, you are really good, there is no problem with the test, it has successfully calculated all the data."

"What's more, it directly helped us find the optimal conditions for our experiment, which saved us at least several months."

"At present, the tutor is doing a laboratory, and the results will come out later."

Xu Chuan nodded, he was not surprised by this result, the core mathematical formula was derived by him, as long as the code is fine, then the program is fine.

And the probability of a problem with the code, with the carefulness of that senior sister, is almost negligible.

The two came to the laboratory together, just as the experiment in the hands of the mentor was completed, and the experimental data had been transmitted to the printing room.

"Xu Chuan is here."

Seeing Xu Chuan, the mentor Chen Zhengping greeted with a smile, and continued: "This experiment, thanks to you, the previous analysis of the concentration of hydrogen reducing agent and the establishment of mathematical models have helped us a lot, shortening the time by at least three or four months. ”

"Students are low-level, so it's good if they can help."

Xu Chuan subconsciously said modestly, causing the three senior brothers in the laboratory to roll their eyes.

A college student who can prove a world-class mathematical conjecture can save them months of experimental time in a few days.

It's still incompetent, so what are they?

Rubbish?

Or is it better to be wasted?

MMP, this β is really not rounded at all.

Chen Zhengping, after hearing this, shook his head with a smile and said, "You, don't be so modest. ”

"But you came just in time, the experimental data here has just come out, and then help me analyze it, I have a hunch that the tiling generation rate of tungsten diselenide nanosheets in the new experiment can reach more than 80% after the optimization of the mathematical model."

Xu Chuan nodded, he was also a little curious about how far this mathematical model could go.

Although the mathematical model of each experiment is different, there is a part of the same thing, just like the code of many software, which can be ctrl+c and ctrl+v.

This thing is not only useful for his mentor's experiment, but also when he conducts his own experiments to study certain materials in the future.

So he's still quite concerned.

After a while, the senior brother Fan Pengyue took the printed experimental data.

Three copies of the experimental data were made, one by Chen Zhengping, one by Xu Chuan, and one by him and the other two senior brothers.

.......

After receiving a piece of information from the senior brother, Xu Chuan directly turned to the tiling generation rate of tungsten diselenide nanosheets.

【79.8212%】

A number came into his eyes, and his mentor Chen Zhengping's speculation was correct, and the tiling generation rate of tungsten diselenide nanosheets prepared by the hot solvent method reached about 80%.

That's a pretty impressive number.

You must know that in the previous time, the tiling rate of the finished product calculated by him was only 48.32%, which was an increase of nearly 30 percentage points, which is quite an exaggerated proportion.

It can be said that the original two raw materials can only make one finished product, but now two raw materials can make one or six finished products.

It's like if you and a colleague are working on the same job at the same time, and he can only earn 48 yuan a day, and you can earn 80 yuan, which is almost double your income.

After determining the data of the tiling rate, Xu Chuan flipped through the experimental data again, and then shook his head slightly.

The tiling rate of tungsten diselenide nanosheets has been improved, but the collapse and rollup effects of tungsten diselenide nanosheets still exist when they are tiled.

Van der Waals forces still have a great influence on tungsten diselenide nanosheets, and after selecting the optimal synthesis conditions through mathematical models, the remaining 20% of the generation rate, excluding other interference factors, will probably cause about 15% of the generation rate impact.

The defective rate of 15% is also quite an exaggerated figure.

It's like a hundred yuan, you used to buy 100 steamed buns, but now you can only buy 85.

Fifteen yuan is missing out of thin air, and no one is reconciled.

Xu Chuan is the same, he is thinking about how to deal with the impact of van der Waals.

If Van der Waals can be solved, then he is sure that he can increase the yield of tungsten diselenide to more than 95%.

Another 15 percent increase in yield is something that any lab will do its best to do.

Chen Zhengping was no exception, he was very happy at first when he saw that the tiling rate of tungsten diselenide nanosheets had reached 80%, but then the van der Waals force effect he discovered made him frown.

Shaking his head, Chen Zhengping put down the data in his hand, looked at Xu Chuan, and asked, "How is it, did you find any problems?" ”

Xu Chuan: "The previous peak error has disappeared, and there are no other data problems found for the time being, and the generation rate of nearly 80% has increased by 30 points compared to the previous generation rate of less than 50%, which is very impressive." ”

"However, I found that in the final stage of tungsten dielenide tiling, it will still collapse and roll by about 20 percent, I read a little book about the material when modeling before, and speculated by the way, this should be caused by intermolecular forces, right?"

Chen Zhengping glanced at Xu Chuan in surprise, nodded, and said, "That's right, this twenty percent collapse is indeed caused by Van der Waals. ”

"This is related to the molecular properties of tungsten diselenide, which is an inorganic compound with a layered structure, each tungsten atom will be bonded with six selenium atoms in a prismatic coordination manner, and each selenium atom is bonded with three tungsten in an angular pyramid configuration."

"This also gives it the ability to have polarity between molecules and between molecules and crystals, and one polar molecule polarizes the other, creating an induced dipole moment and attracting each other, which leads to collapse."

"The movement of electrons in a molecule produces an instantaneous dipole moment, which instantaneously polarizes neighboring molecules, which in turn enhances the instantaneous dipole moment of the original molecule, which leads to rolling."

"And these two manifestations are the van der Waals force, that is, the two manifestations of intermolecular forces, which are very common in materials, sometimes they are indispensable, but sometimes they can cause us problems."

"Xu Chuan, you have read the material books before, do you have any ideas?"

Suddenly, Chen Zhengping changed his words and asked Xu Chuan.

......。