Great Country Academician

After hanging up the phone, Xu Chuan hurried to the material research and development building.

As soon as he arrived at the building, he saw the elder brother Fan Pengyue waiting downstairs.

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

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

"And the mathematical model you brought over the afternoon before yesterday has also passed the check. You are really good at writing. There is no problem at all in the test, and it has successfully calculated all the data."

"More importantly, it directly helped us find the best experimental conditions, which saved us at least several months."

"Currently, 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 correct, the program is fine.

And the probability of code problems, with that senior sister's level of care, is almost negligible.

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

"Xu Chuan is here."

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

"Students have low abilities, so it's good to be able to help."

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

A college student who can prove a world-class mathematical conjecture, a genius who saved them months of experiment time in a few days.

This is still incompetent, so what are they?

waste?

Or is it better than trash?

MMP, this β is really not round at all.

On the other hand, Chen Zhengping shook his head with a smile after hearing this, and said, "You don't have to be so modest."

"But you came at the right time. The experimental data from my side just came out. Let me analyze it again. I have a hunch that after the optimization of the mathematical model this time, the tiling rate of the new experimental tungsten diselenide nanosheets can reach 100%. over eighty."

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, some things are the same, just like the codes of many software, you can Ctrl+C, Ctrl+V.

This thing is not only useful for his mentor's experiment this time, but also part of it can be used when he conducts experiments on certain materials in the future.

So he still cares.

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

Three copies of the experimental data were copied, one for Chen Zhengping, one for Xu Chuan, and he and the other two senior brothers shared one copy.

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

【79.8212%】

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

This figure is quite impressive.

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

It can be said that in the past two raw materials could only produce one finished product, but now two raw materials can produce 1.6 finished products.

It's like when you and your colleague do a job at the same time, he can only earn 48 yuan a day, but you can earn 80 yuan, almost doubling your income.

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

The tiling generation rate of tungsten diselenide nanosheets has been improved, but the collapse and rolling effects of tungsten diselenide nanosheets still exist.

The influence of van der Waals force on tungsten diselenide nanosheets is still very large. After the optimal synthesis conditions are selected through the mathematical model, the remaining 20% ​​of the formation rate excludes other interference factors. It will probably also affect the spawn rate by about 15%.

A defective rate of 15% is also a rather exaggerated figure.

It's like one hundred yuan. You could buy one hundred steamed buns before, but now you can only buy eighty-five.

Fifteen yuan was lost out of thin air, and no one was reconciled.

The same is true for Xu Chuan, he is thinking about how to solve the impact caused by van der Waals force.

If the van der Waals force can be eliminated, he is sure to increase the yield of tungsten diselenide to more than 95%.

To increase the yield rate by 15%, this is something any laboratory will do its best to do.

Chen Zhengping was no exception. At first he was very happy when he saw that the flat formation rate of tungsten diselenide nanosheets had reached 80%, but the van der Waals effect he discovered immediately 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 no other data problems have been found for the time being. The generation rate of nearly 80% has increased by 30 points compared with the previous less than 50%. This is very impressive. .”

"However, I found that in the final stage of tiling tungsten diselenide, it will still have about 20% collapsed folds. When I was modeling before, I read some books about materials and speculated by the way that this Should it be caused by intermolecular forces?"

Chen Zhengping glanced at Xu Chuan in surprise, nodded, and said, "That's right, the 20% collapse is indeed caused by van der Waals force."

"This has something to do with the molecular properties of tungsten diselenide. It is an inorganic compound with a layered structure. Each tungsten atom will bond with six selenium atoms in a prism coordination manner, and each selenium atom will be in the form of a prism. pyramid-like configuration and three tungsten bonds."

"This also gives it polarity between molecules and between molecules and crystal structures. One polar molecule polarizes another molecule, generates an induced dipole moment and attracts each other, which leads to collapse."

"And the motion of the electrons in the molecule creates an instantaneous dipole moment, which momentarily polarizes neighboring molecules, which in turn enhance the original molecule's instantaneous dipole moment, which leads to coiling."

"And these two manifestations are van der Waals forces, that is, the two manifestations of intermolecular forces. They are very common among materials, and sometimes they are indispensable, but sometimes they can cause us trouble."

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

Suddenly, Chen Zhengping changed the subject and asked Xu Chuan.