Finding a small problem does not mean that the data analysis of tungsten diselenide is completed.

The purpose of Xu Chuan's help this time was to analyze and find out what hindered the complete crystallization of tungsten dielenide in the process of tiling, rather than the problem of losing the material in the first place.

Of course, the latter is also very important, after all, a small peak segment directly affects the yield rate of more than ten percentage points.

So for the rest of the time, some of his mentors and brothers were busy.

If you want to go on the synthetic road of solvothermal method, then you must find out what causes this small peak.

As for Xu Chuan, after understanding the corresponding significance of these experimental data, he returned to his dormitory with some experimental data and materials.

He is still more accustomed to solving problems in the dormitory or in the library, the former is quiet and undisturbed and easy to think, and the latter swims in the ocean of knowledge, and can go to the bookshelf to find materials as soon as he encounters any problems.

......

In the dormitory, Xu Chuan spread the materials he brought back on the desk and read them carefully.

Although he already knew the reason for the failure of tungsten diselenide tiling, it would take some time to describe it in mathematical language.

"Judging from the experimental data, the problem of the reducing agent interfering with tungsten dielenide materials only occurs in the solvothermal method, and other synthesis methods do not have similar problems."

"That is, the problem arises either with the reducing agent hydrogen or with the hot solvent."

"However, this point is put aside for the time being, which needs to be experimentally demonstrated, and the next step is the problem of tungsten diselenide nanosheets collapsing or rolling due to van der Waals forces in the late stage of tiling."

"This problem is the core, but it is not so easy to ...... to solve"

"In the case of excluding the reducing agent and the influence of the substrate first, from the experimental data, different concentrations of tungsten diselenide raw materials also have an effect on the tiling process....."

Prostrate in front of his desk, Xu Chuan wrote and drew on the manuscript paper while staring at the data he brought back.

"Let the concentration be R, the time is T, the temperature is C, the pressure is P, the current density is A, and the reducing agent concentration is H...... The collapse phenomenon of tungsten diselenide nanosheets is generally ..... with the increase of H in the fixed TCPR No change? ”

"Huh? What the hell is going on? ”

After calculating the data in his hand, Xu Chuan looked at the data on the manuscript paper with some astonishment.

He was a little skeptical that he had miscalculated.

How is this possible, the collapse roll problem is not affected by the reducing agent concentration?

Shaking his head, Xu Chuan took the data from another experimental data and recalculated it again, but the results were still not too similar.

After two more calculations, the results are still the same, although the results are slightly different each time, but overall, from the data, the collapse roll is not affected by the H concentration.

This situation made him frown, he had been studying materials for so many years, and it was the first time he had encountered such a strange situation.

"It's really interesting."

Xu Chuan put down the pen in his hand, leaned back, fell on the back of the chair, and stared at the gray ceiling in thought.

For the R&D and preparation of a material, a slight change in various details such as temperature, pressure, raw material concentration, time, and reducing agent concentration will cause changes in the finished product.

But now the experimental data of the instructor told him that the concentration of the reducing agent had almost no effect on the formation of the finished product.

That is, is it possible that hydrogen, the reducing agent used by the mentor, hardly plays any role in the generation of tungsten diselenide nanosheets?

This is even more absurd than being told that God is a dog.

But the data he calculated told him that this was exactly what happened.

It doesn't get any more absurd than that.

"No, no, there is also the possibility that the concentration of the lowest value of the hydrogen reducing agent is completely saturated."

"It's like if you add salt to a serving of saturated salt, no matter how much you add to it, it won't melt."

"If that's the case, it's really going to have very little impact."

Staring at the ceiling, Xu Chuan skillfully thought about the various situations he had encountered when studying materials before, and applied them to this experimental data.

"Maybe I should build a mathematical model? To determine the influence of hydrogen reducing agent concentration and other parameters on the collapse and rollup of tungsten selenide nanosheets? ”

Suddenly, an idea came to Xu Chuan's mind.

It is not uncommon to apply mathematical models to materials development experiments.

The study of practical problems through the establishment of appropriate mathematical models has become an important means of materials science research and application, but not every laboratory has such capabilities.

After all, most materials experiments involve a lot of variables, and the experimental process is dynamic, so it takes a lot of energy for even a university mathematics professor to build an accurate dynamic model.

"Let's make one, I just had a little communication with my senior sister two days ago, so I can do it in practice."

After thinking about it, Xu Chuan picked up the pen and paper again and began to list the variables and conditions on the manuscript paper.

"Let the rate of collapse and coiling of tungsten diselenide nanosheets be E, then E₁=∫²₁pgh/Am·sh(2C°²*pD)....."

Mathematical modeling is indeed not his strong point, and he has asked other mathematics professors in Princeton to model materials experiments for him in the past, but he can still do a simple analysis of the experimental data of tungsten diselenide, and carry out data mining and use mathematical tools to integrate.

After all, he doesn't need this model to be very accurate, he just needs to roughly determine whether the hydrogen reducing agent has enough influence in the experiment.

Little by little, the sky outside darkened.

For a whole afternoon, Xu Chuan was sorting out the experimental data, and dissecting the useful data into the execl table for subsequent processing.

This is quite a tedious task that requires patience and care, and once a piece of data is entered incorrectly, the whole model will be scrapped at that time.

It's like a financial account, and I found that the company's account had an extra 100,000 yuan, and I don't know where it came from.

In the end, you have to work hard to recheck the data.

......