Chapter 25 The Simplest Scientific Research Technique (Please read)
More than two hours later, Zhang Wei and Ye Haotian, one on the left and the other on the right, supported the autistic person and walked back to the Bauhinia Apartment.
Today was the first time for an autistic person to drink alcohol, and then he discovered a new world and couldn't stop at all.
The key point is that he is still the type who likes to eat and drink. He drank a few glasses of beer and got himself drunk.
“This is the first time I’ve seen someone get so drunk after drinking beer.” Zhang Wei shook his head helplessly.
"Isn't this normal?" Ye Haotian said.
“You don’t understand. When you drink beer there, each person at the table gets a bottle. Everyone gets a share and tries to drink them all. Don’t waste it. When we drink beer there, each person has to drink a box first. You want it after you finish it.”
“One box for each person? You want it after you finish it?”
“Why do you know Qinhai?” Beer? In the summer, people here drink it like water! If you have a chance to go to my hometown, I’ll treat you to beer and clams..."
As the two of them were talking, the autistic man suddenly burst out of his mouth. A sentence popped up:
“When an object moves with speed v relative to a stationary observer, the relationship between the time t experienced by the object and the time t0 experienced by the stationary observer can be expressed as t=t0/γ, where γ is a relationship between the speed v and the speed of light. Factors related to c, γ=1 square root 1-v squared by c square..."
"What is he talking about?"
"It seems like the theoretical formula of time dilation."< br>
“Time dilation? What is that?
“It’s something mentioned in Einstein’s theory of relativity! ”
"Do you understand Einstein's theory of relativity?"
"If I want to understand that stuff, do I need to go to college?"
The two people said, looking at Chen Ming in unison.
This autistic man seems to really understand Einstein’s theory of relativity.
Mental patients have broad thinking, and mentally retarded children are much happier. The ancients did not deceive me!
...
Along the way, the autistic man kept reciting the theory of relativity and did not stop until he returned to the dormitory.
Ye Haotian helped the autistic man to the bed and said at the same time; "I have known him for a month, and what he has said in total is not more than one-tenth of what he says today!"
"This guy shouldn't have learned the theory of relativity all night long!" Zhang Wei scratched his head with lingering fear.
Dad Zhang is the kind of person who talks non-stop after drinking. Especially when he is drunk, he can't remember anything he said. Anyway, he can't stop talking. I can tell you about millet seventy-two times from eighteen angles.
So every time he saw his father drunk, Zhang Wei quickly found an excuse to run away, fearing that he would be caught as a young man, and stayed to listen to the story.
I can at least understand what Dad Zhang said when he was drunk, but what comes out of an autistic person's mouth is Einstein's theory of relativity. Who in the normal world can understand it? !
Recalling the horrific scenes of being dominated by his drunken father for eighteen years, Zhang Wei was actually a little scared.
"No, I can't stay in the dormitory today, I have to run away quickly!"
Thinking of this, Zhang Wei yawned and said; "Brother Haotian, rent a house It’s not finished over there yet. I’ll go back and clean it up again. I won’t come back to sleep at night. You should go to bed early!”
After Zhang Wei finished speaking, he took three steps and two steps at a time, and ran away quickly.
Ye Haotian looked at the autistic man lying on the bed. At this time, he was reciting the principle of the constant speed of light in the theory of relativity.
"Go to bed early? He keeps nagging me, can I sleep?" Ye Haotian sat aside dejectedly.
......
Zhang Wei returned to the rental house. He first took out a roll of transparent tape, then took out another small box from the closet, opened the box, and took it from inside A black sheet came out. This black sheet is a high-purity graphite sheet.
Then he will cut a piece of tape, stick it on the graphite sheet, pull it with his hands, and tear off the tape.
Zhang Wei then observed the piece of transparent tape and found that it was indeed stained with black graphite.
Zhang Wei cut another piece of transparent tape, stuck it together with the first piece of tape, and quickly tore it off again.
The two pieces of tape were both stained with graphite.
After repeating the same operation several times, no graphite residue can be seen on the tape.
But this is only the result of viewing with the naked eye. Zhang Wei can be sure that if he just finds an optical microscope to observe, he will definitely be able to find graphite particles on the tape.
“It seems that the next experimental operation can’t be carried out until the microscope and spectrometer arrive. I just don’t know how many times this operation will have to be repeated before graphene can be obtained.”
Then Zhang Wei looked at the piece of graphite again, and thought to himself: "There is also this graphite, which needs to be changed. If you want to extract graphene, you still have to use highly directional pyrolytic graphite."
Put the graphite into place. The film and explanation were casually thrown aside, Zhang Wei leaned on the chair and crossed his legs.
"Optical microscopes and spectrometers should be quite expensive, and the money I have on hand is definitely not enough. When the National Day holiday is over and the stock market opens, I will sell Qilu Petrochemical's stocks. I don't know how much I made!"
……
The preparation of graphene is actually very simple, just use office transparent tape.
In the 1940s, when scientists proposed the concept of single-layer graphite structure, it did not attract the attention of the academic community.
Because of the single-layer graphite structure, it means that there is only one layer of carbon atoms. In that era when there were no particle accelerators, preparing a layer of carbon atoms was simply a dream!
In 1985, humans prepared fullerene, which gave scientists hope of preparing graphene.
But the results are not satisfactory. Scientists have spent a lot of time, consumed huge amounts of money, and adopted a variety of methods. However, no scientist has succeeded in more than ten years.
Until 2004, Andre Geim, a physics professor at the University of Manchester in the UK, accidentally saw graphite residue on a piece of scotch tape in the laboratory trash can.
This piece of transparent tape is ordinary office tape. It was originally used by students to fix graphite in their homes when doing experiments. After the experiment, the tape was no longer useful, so it was naturally thrown into the trash can as garbage.
However, Andre Geim had an open mind, and he wondered if graphene could be separated directly using tape.
The essence of graphite is actually layers of graphene stacked on top of each other. If one layer is taped down with tape, the graphite will be thinner.
Theoretically, as long as you keep repeating this operation, in the end, you will definitely be able to get a single-layer graphite structure, which is graphene.
So Andrei Geim found his partner Konstantin Novoselov. After discussing it, the two actually did this and successfully separated graphene. !
Countless scientists have used countless complicated methods, but none of them have been able to do it. In the end, they used tape to simply and crudely stick it out!
As far as scientific research is concerned, this method is too simple. The experimental exams of the high school entrance examination are much more difficult than this! Normal scientists have all kinds of scientific and technological means in their minds. Who would have thought of using this earthly method to prepare graphene.
High-end ingredients often only require simple cooking.
High-end scientific research can also use the simplest scientific research techniques!
Of course, although this method is very simple, its specific implementation requires patience and time, and it cannot be produced on a large scale using this method.
In addition, this method can only obtain a small amount of graphene, and the quality is not very good.
But for scientific research, it is enough. Regardless of the quantity or quality, as long as graphene can be prepared, it will be an atomic bomb in the scientific world, enough to win the Nobel Prize. !
Thank you all Andy Lau for your contribution to the follow-up reading. Now the recommendation mechanism before Qidian is released mainly depends on the follow-up reading. If the follow-up reading is not enough, a veteran like me will not be able to be recommended, so I have to ask you to continue to cheer for me! Thank you!
(End of this chapter)