Chapter 497: Just like the feeling of walking on the edge of a cliff

Xu Qingzhou went to the laboratory for a trip, checked the data and equipment operation, didn't stay long, became a hands-off boss again, and went to the library to do calculations.

Although Sun Simin and Ma Ersi couldn't get started yet, they could also help do odd jobs, guard the laboratory, Carson alone could handle it.

Hope to use mathematical ways, through statistics, modeling, fitting, etc., to transform discrete, superficial data into quantitative descriptions of phenomenon laws, digging into the laws and connections hidden between various parameters.

On the other side, after Professor Carlisle and Xu Qingzhou separated, he went straight to Professor Roberts' office.

"An iced Americano, thank you."

Professor Carlisle said to Horn, after speaking, sat down in front of Professor Roberts, and said helplessly: "Congratulations, you won."

"I am very happy to hear this sentence..." Professor Roberts was not surprised.

This young man has a kind of terrible persistence at certain times. Perhaps, it is this kind of persistence that has earned him his current honor.

"Thank you." Professor Carlisle took the coffee Horn handed over, sipped it, and said in an incomparably regretful tone: "The Department of Mathematics finally had its own Fields Medal winner, but he ran to do physics."

"At the very least, he went to class, didn't he..."

Professor Roberts shrugged.

Professor Carlisle said in a deep voice: "Perhaps, I should learn your optimistic mentality, but the fact in front of me now is that Princeton, Cambridge, and other universities have already achieved phased results, while they are just starting... No, I have to go back and study how to let this Fields Medal winner play his due role."

October 22nd, Friday, it rained last night, opened the window, and the damp air drilled in from the cracks.

Xu Qingzhou stood by the window with a cup of coffee, let out a long breath, after the rain, the sky was clear, by the river, the red maple and caramel-colored sycamore leaves were layered, and fallen leaves were all over the ground.

The production process of the optimization model was much more complex than he imagined, at least another four or five days were needed to get it done.

This was also because Song Yao was watching, so it was not easy to stay up late.

Otherwise, like in the past, he had the confidence to liver it out in two days.

But with the lessons from his previous life, the body is the capital of revolution, and he restrained a lot, able not to stay up late then not stay up late.

No wife and children, but have a wife, more need to cherish the body.

He moved his neck that was a bit stiff: "Around the 25th can complete Student Song's high-frequency signal synthesis work, the model currently has no difficulties. Not bad, all in the plan."

At this time, the phone on the table vibrated with a buzz.

"Professor, according to your requirements, we conducted four more graphene substrate preparation experiments, but now there is unfortunate news. In the four experiments, graphene had 'carbon atom dancing' at 350°C. Sorry, I think this description is very appropriate, sp2->sp3 hybridization, causing electron mobility to plummet by 40%, the final result, substrate structure damage... the data has been sent to your mailbox."

"Professor, I think it is necessary to find an insider in chemistry to analyze the composition problem for us."

Carson reported on the phone.

Damn, just said it was smooth, this is a problem.

"Not urgent, I'll look at the data first."

Xu Qingzhou secretly said it was a crow's mouth, sat down, opened the data report in the mailbox, and quickly found the abnormal point of the data.

XPS detection results showed SnO impurity content 8.7%.

Deposition rate 0.2nm/s

All have problems.

This means... the precursor was chosen wrong?

Xu Qingzhou frowned, recalled the materials he had read, whether the physical experiments he had done before had encountered the same difficulties.

Physics should be feasible, shouldn't be like this...

Then consider chemistry?

He then drew the structure of Sn(Net)2, checking which link went wrong.

Traditional Sn precursor thermal stability is relatively poor, switch to diethylamino tin (Sn(Net)2), precursor decomposition temperature drops to 350–400°C, should significantly reduce Sn volatilization.

But the current result is exactly the opposite.

On the other end of the phone, Carson saw Xu Qingzhou half-speaking, couldn't help but shout: "Professor?"

"Give me 2 minutes."

Xu Qingzhou returned to his senses, pulled out another manuscript from one side.

"Oh, good."

The sound of writing rustled in the living room.

Half a manuscript was already filled with complex reaction formulas.

For a moment, Xu Qingzhou's pen suddenly stopped, gazing at the reaction drawn out.

【SnO2+4H->Sn+2H2O】

That is to say, part of Sn atoms will be oxidized to SnO2 (tin dioxide).

Found the problem!

Xu Qingzhou stared at the formula on the manuscript, his brows relaxed, and said: "You go borrow a PlasmaPro100, add H plasma, reduce SnO impurity to metal Sn in real-time, when the thin film grows, use hydrogen atoms to solve the oxide."

"Ah?"

"You won't?"

Xu Qingzhou frowned and asked, it's just adding H plasma, the operation is not difficult.

"No no no, quite simple operation... Professor, you thought of it on the spot?"

"Any problem?"

"No problem."

Xu Qingzhou nodded slightly, ordered in a deep voice: "Good, do four more sets, make the data of the new precursor first, I need to see the results before Friday, no problem, right?"

"No problem."

Xu Qingzhou hung up the phone and sank into the calculation again.

On the laboratory side, seeing Carson hang up the phone, Ma Ersi asked curiously: "What did the professor say?"

Sun Simin's attention also moved away from the textbook in front of her.

"Let us add H plasma, and do four more control experiments according to the current conditions." Carson said in a deep voice.

Ma Ersi was surprised: "The professor is also proficient in chemistry?"

"Shouldn't we have adapted early?"

Carson shrugged and said.

Ma Ersi was stunned, feeling that Carson's words seemed to make sense. The longer they contacted, the more he felt the professor was unfathomable, math big shot, physics not weak, repair a little...

Now it seems, chemistry seems to be slightly understood.

"I have to go to the equipment management office."

Carson didn't waste time either, immediately prepared to start, the research group had only four of them, the boss couldn't come, the heavy responsibility fell on him.

Although very busy, he was full of energy.

Still quite stimulating.

Just like the feeling of walking on the edge of the cliff between failure and success.

Experiment fails, all is lost.

Experiment succeeds, create a miracle.

Apartment.

Xu Qingzhou was not affected by the laboratory side, busy with his own calculations, now at least need to make a sample that can be seen, to further iterate, see if some concepts from the past can be used on superconducting thin films.

Just like building a car, no matter how good the technology is, must first be able to produce a car that can drive normally.

【Objective function: 【\begin{can_{ext{sn}}\quad(ext{sno}_2ext{content})\end{cases}】】

【Phase-field model.

f=∫【f(φ)+(e/2)|φ|2}{2}|\nabla\phi|^2\right】dv】】

He had already combined the kinetic equation and the free energy functional together to simulate the grain growth and competition mechanism during the annealing process.

And the Monte Carlo simulation was also more than half completed, enough to determine the quantitative relationship between doping density and grain size.

The next step is the most troublesome.

Use topology optimization to reduce surface roughness and improve mechanical properties.

(End of chapter) ===== CHAPTER 498 =====