Chapter 204 Elastic Constants of Two-Dimensional Materials (Page 1/1)

Computational materials science currently has two of the most widely applied methods.

The first is to combine the test data, through the establishment of a mathematical model and then through numerical calculation, simulation and reproduction of the actual process, and then through repeated correction of the previous mathematical model, to achieve a certain physical explanation, focusing on experimental research and application.

The second is computational simulation, that is, for specific materials, specific physical mechanisms or reaction mechanisms, directly through theoretical models and numerical calculations, predicting, designing or modifying the structure and properties of materials, focusing on theoretical research and foresight.

Previously, when Wu Bin was reading the literature, he read an article on calculating the elasticity of two-dimensional materials in Changshu, which said that the energy-volume curve was used to fit.

Their laboratory can calculate the elastic constant of two-dimensional materials with IBRION=6 and ISIF=3, but after reading this, Wu Bin found that the elastic field number of graphene is too many units, and some literature assumes that the effective thickness of graphene is 0.34 nanometers, and Young's modulus is about 1TPa.

But there are second-order reciprocals like 60eV, as well as 345N/m, 350GPa*nm, and so on.

Therefore, calculating the elastic constant of two-dimensional materials has become a new topic for Wu Bin, although on the surface, this research cannot help him solve the problem of mass production of graphene.

But he firmly believes that as long as he understands a little more two-dimensional materials, there will eventually be a bright spot that can become the basis of his theory.

In addition, Lin Ziqi has also gained a lot this month, I don't know if it is because the theoretical foundation has reached saturation, or because she has been cultivated by Wu Bin for a long time, her experimental hands-on ability has suddenly been improved.

For example, the night before yesterday, she excitedly called Wu Bin to the laboratory, and turned a picture into a sound signal on the spot, and then added an oscilloscope, so as to show the picture on the oscilloscope.

After reading it, Wu Bin nodded affirmatively and commented, "If you put it 80 years ago, you would definitely be a talent for making TV sets." ”

His words are not encouraging praise, but he really thinks that Lin Ziqi can use the simplest old-fashioned electronic oscilloscope equipment to demonstrate the principle of television, which can be said to be quite powerful.

Lin Ziqi, who was praised, also looked very happy,

The next day, Feng Jinhui heard about it and said: "The laboratory has always been a place where you can find out what people are suitable for. ”

This incident can be said to have greatly stimulated Lin Ziqi's enthusiasm for scientific research, and she went to the library much earlier in the morning.

Because the total funding of Professor Liu's project is quite abundant, some small research funds when Wu Bin researches graphene only need to apply to Feng Jinhui for a gesture, and the outstanding one is that he has a lot of money!

Of course, this is all in exchange for Professor Liu's years of accumulation of credibility, as for what is credibility? That's giving money, you can give things, that's reputation!

You must know that there is no shortage of experimenters all over the world who break their legs for funding, and they don't do a few experiments all year round, and they have to grind with various investors, so it can be said that it is really a bit difficult for a science man to do this.

Moreover, Professor Liu also told him that from the next semester, if he joins a tutor's project, he will be able to get a salary, and it will not be a dead salary, it will be set according to the workload.

At present, 15% of the application project funds of major universities are usually used as graduate labor fees, for example, your component is 800,000 yuan of total funds, of which 120,000 yuan is the labor fee of graduate students.

For ordinary undergraduates, it is basically treated as a miscellaneous job, and the salary is paid monthly, as for the amount...... I'm embarrassed to say it, at most, it's a meal allowance.

However, Wu Bin is a little special, his knowledge is wide, a person is an army, and the enthusiasm for scientific research is extremely high, for some experiments that do not require the collection of a large amount of data, he really does not need any helper, he can do it himself.

Wu Bin, who was engaged in the new experiment, immediately entered the mode of no distractions, his mind was full of experimental data, and he was so hungry that he couldn't concentrate until ten o'clock in the evening, so he rubbed his eyes and soaked a bowl of fresh shrimp and fish noodles.

Wu Bin glanced at his mobile phone by the way and found that Pei Jiamin sent him a message at noon on WeChat.

[Congratulations, why don't you say something like "Science" in the group of classmates, it's too out-of-the-box, right? ] 】

Wu Bin took a sip of instant noodles after reading it and replied.

[Low-key, low-key. 】

After posting, he was about to put down his phone, but found that Pei Jiamin actually replied in seconds.

[You're too low-key! 】

[Do you know how you feel when I found out through my dad that you posted "Science"......]

Bad guy: [Hmm...... What's the mood? 】

Pei Mimi: [......]

Cheers to our false friendship. 】

Bad Guys: [......]

[Not really......]

Pei Mimi: [Shouldn't you share things worth celebrating with your friends?] 】

Bad guy: [Okay, my pot, I'll be sure to inform you next time.] 】

Pei Mimi: [Xueba is Xueba, this is scheduled to be released next time "Science"? 】

seemed to be satisfied with Wu Bin's attitude of admitting his mistakes, so Pei Jiamin stopped pursuing it and made a joke.

Bad people: [It is also possible to post "Nature"~]

Pei Mimi: [Awesome, to be honest...... In fact, after my dad told me, I searched for science to find out what level of journal it is, and I feel like you are going to become a big scientist in the future? 】

Bad guy: [Who knows what will happen in the future, but I think I will continue on the road of scientific research.] 】

Pei Mimi: [Well, I should have been on the road of medicine as well. 】

Bad guy: [Come on, I'm sure I'll see your article on Cell one day.] 】

Pei Mimi: [Don't dare to think, don't dare to think. 】

[Then I'll sleep first, don't work too hard.] 】

Bad guys: [Okay, good night.] 】

Putting down his phone, Wu Bin began to eat noodles in large quantities to accumulate energy for the night.

……

On Monday, Wu Bin went back to his bedroom to take a shower, and as soon as he approached the door, he heard a sound similar to that of a guitar, but it was a little different.

Pushing open the door, Wu Bin glanced at the bedroom, and immediately found the source of the sound, Li Yan, who was holding a small guitar.

"Huh!? When will you be able to play the guitar? Wu Bin asked in surprise.

"Just learned." Li Yan played a note, "Besides, don't be so layman, it's called a ukulele, not a guitar." ”

"Ukulele ......? No wonder it sounds different. Wu Bin said as he rummaged through the change of underwear.

"It's a drop, although the appearance is very similar, but it's actually two completely different musical instruments, play you a song "Castle in the Sky" that I just learned, listen to it."

PS: For the reward of the little brother of Erha, thank you for your support~

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