Chapter 469

"Is it here?"

"It should be here..."

"I hope it is here!"

Xu mang stands in front of an office. He wants to see a scanning tunneling microscope. Oxford University has a scanning tunneling microscope. The key is in Professor Martelli's hand.

After a call to come in, Xu mang pushed the door and saw a middle-aged woman standing in front of a blackboard filled with various formulas.

"Eh?"

"Professor Xu?"

Martelli was stunned when she saw that it was Xu manghou. She changed her smile and asked, "what can I do for Professor Xu?"

"Hey, hey..."

"Hello, Professor matley." Xu mang said with a smile: "I look for you mainly to know about the scanning tunneling microscope."

"Scanning tunneling microscope?"

"Is this related to the gaseous carbon rings you're studying?" Asked Professor mattley curiously.

"There is no necessary connection, just simple curiosity, want to know about it." Xu mang said with a smile: "I don't know if professor Martelli is willing or not. I think this requirement should be very simple, not very difficult..."

Martelli nodded and seriously said, "Professor Xu seldom talks, how can I help you do it."

After a moment,

Martelli took Xu mang to the laboratory.

At first, I thought that I needed to go a long way. As a result, I opened the door and went to the opposite door.

Xu probably knew about the scanning tunneling microscope before. A probe slowly passed through the material to be analyzed, and the electric charge was placed on the probe. A current flowed out of the probe and passed through the whole material to the bottom surface.

When the probe passes through a single atom, the amount of current flowing through the probe varies, and these changes are recorded.

The principle is that the current rises and falls when it flows through an atom, so that the outline of the current can be found out in great detail. By drawing the fluctuation of the electric flow, man can get the grid structure diagram of a single atom.

We all know the truth,

but understanding and operating are two different things. It's like Xiaoman knows that he is an airport and wants to be bigger. But this is not to say that big is big. There is a process from flat to big. Even if I read a lot of books and tell Xiaoman a lot of skills to grow bigger, it is a big deal to operate.

Theory and practice are different!

"STM has two working modes: constant current mode and constant height mode. In general, constant current mode is adopted. This working mode can obtain comprehensive image information and high quality microscopic image."

"Of course... The constant height mode also has its own characteristics, in which the microscopic image is obtained through the tunnel current without the need for a light source and a lens."

After a pause,

Martelli then said, "STM has several functions. I won't talk about scanning. In addition to scanning, STM can be used to detect defects and damages on various structures on the surface, and establish or cut the connection line by surface deposition and etching to eliminate defects and achieve the purpose of repair, that is, flaw detection and repair."

Xu mang nodded again and again. At this time, he had already opened the memory mode, memorized all the contents of Martelli in his mind, and copied the basic parameters on the instruction manual.

"Professor Martelli?"

"Where did you buy this equipment?" "It seems that... It looks like it was made by myself," Xu asked

"Yes

"We provide drawings, and then the engineering school builds them for us." "This STM is almost one of the highest resolution in the world, has won the best innovation award, and helped many Nobel laureates carry out experiments," she said with a smile

"..."

"awesome!"

Xu mang immediately envies unceasingly, looking at this ugly iron pimple, instantly moved a crooked brain.

Copy!

This is the most powerful microscopic tool in the world, and then it can be completely copied. Then it can be brought back and made by ourselves, so as to avoid being blocked by technology in this respect.

"Ah?"

"Is this part shock absorbing?" Xu asked.

"Yes

"Because the working distance is less than one nanometer, and the tunnel current is exponentially related to the tunnel gap, any vibration will cause instability, so vibration and impact must be isolated, and vibration must be isolated!" "I can't tell you exactly how to reduce the shock, it's a secret," matley said

Xu mang showed a smile and nodded to Martelli: "I can understand."

In fact,

at this time, Xu mang probably guessed how to reduce the vibration, which could not be achieved by relying on the spring itself. It was estimated that the frequency of the external vibration and the natural frequency of the instrument were cut in to coordinate the two frequencies to a numerical value.

After all,

is easy to do with a computer.

Then

Xu mang asked a lot of questions, but Professor Martelli only talked about the general content, and some of them reserved Xu mang. But in many cases, Xu mang can guess seven or eight, and very few of them do not know at all.This function parameter setting... Martelli is completely confidential.

In this regard,

Xu mang had no choice but to accept it. Although there must be a scanning tunneling microscope in China, its resolution is not as high as that. As a result, compared with foreign countries, he is in a weak position.

Back in Martelli's office, Xu mang chatted with her for a while, and noticed the calculation process on the blackboard.

"Professor Martelli is studying... The properties of dispersion in a single resonance model?" Xu mang asked with a smile.

After hearing Xu Mang's words, Martelli's face changed slightly, nodded her head and said, "it's really the problem. I can't imagine that Professor Xu also knows electromagnetism and electrodynamics very well!"

"OK..."

"it seems that the calculation process is stuck, isn't it?" "It's normal to get stuck here," Xu said

"..."

Martelli did not speak. She suddenly realized that the man sitting in front of her was not an ordinary man. He was a man who applied mathematics to the extreme.

Perhaps,

his own problems are not problems in Professor Xu's eyes.

After all, it is impossible for anyone to discover the essence of the problem at a glance.

"Professor Xu..."

"can you help me solve this problem?" Professor Martelli's attitude became somewhat respectful.

"Yes

"It's not very difficult, at least not very difficult for me." Xu mang said with a smile: "but... I really want to know the parameter settings of STM. Of course, I just have a look to get a general idea."

Matley pondered for a long time, and generally refused, but the people sitting opposite were not ordinary people and could not be treated in general.

"Good!"

As a result,

Martelli took out a notebook and handed it to Xu Mang, saying earnestly, "this is the specific parameter setting."

Xu mang smiles and says thank you.

"The system... Turns on memory mode!"

[memory mode start]

"the system... Turns on the animal mode!"

after the start of the animal mode,

Xu mang flipped through the above parameter settings, not to mention... It was really detailed.

After seeing Xu Mang's speed, Martelli was completely relieved. She really just flipped around. If she could remember all of her speed, the world would be too dangerous.

In less than ten minutes,

Xu handed the notebook back to Martelli and said gratefully, "thank you...

" no, no, no! "

"Professor Xu, you are welcome." Martelli said with a smile.

"Ha ha..."

"in exchange, I will solve your problem, and I will send you the following contents." "Do you have a pen and paper?" Xu said seriously

"Here you are

For a moment,

Xu mang began to solve the problems she encountered in front of matri.

It's very fast,

fast enough to frighten professor mattley's face.

This...

How can this be so fast?

Really or not?

At this moment,

professor Martelli began to doubt life. For the first time, she encountered such a situation. The speed was too fast to be looked at directly. Can such a speed have a correct rate?

You're not lying to me, are you?

Shua Shua, Shua Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua, Shua.

Solution...

solved?

Just a few minutes have passed!

Martelli saw that one of her problems seemed to have been solved, but Xu didn't stop writing.

Soon,

ten minutes later, Xu mang quietly put down his pen, picked up a dozen pieces of white paper, and said with a smile: "no, I'm old. I used to be good at it for an hour, but now I'm less than 20 minutes. I'm very tired."

"Good!"

"It's all settled." Xu mang handed the white paper full of the process to Professor Martelli and said, "I'm leaving..."

the words fell,

Xu left the office directly, leaving behind Martelli, who was full of bewilderment.

I...

is this too... Too neat?

Xu Mang's operation made professor Martelli completely confused. She began to doubt the world and whether there were aliens. She thought about the problem for a day, but others solved it in a few minutes, by the way.In other words,

is it right?

That's what Martelli cares about.

Then,

professor Martelli sat in his office and began to read Xu Mang's process. Looking at it, he felt a trace of fear?!

However...

Martelli knew that behind the seemingly simple, it was actually the crystallization of painstaking efforts. Only people like Professor Xu would find it simple.

Five minutes later,

Martelli plans to share this process with her two colleagues and experience the top strength in the industry.

...

"Martelli?"

"Aren't you dealing with the characteristics of dispersion?" Dean saw Martelli coming and asked curiously, "why did you come to me all of a sudden?"

"I..."

professor mattley looked at Dean and bill and said seriously, "my problem has been solved...

"

“？？？”

Solution...

solved?

Dean and bill know what kind of problem Martelli has, it's a mathematical problem of calculation, and Marty's math skills are not outstanding, unless they find a math professor, but... She doesn't seem to get along with math people.

Then

Martelli took out a dozen pieces of white paper, handed it to Dean, and said, "bill, come and have a look at it too!"

Within a few minutes, Dean and bill looked at martley in horror.

"Martelli?"

"You... You compromised with the math department?"

At this point,

professor Martelli, with a smile, said firmly, "no... these calculations are from a professor of theoretical physics!"

......

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