Chapter 28 Attributes of Koi (please read)
In the rental house, Zhang Wei started tearing off the tape again.
The essence of graphite is stacked layers of graphene. A one millimeter thick graphite sheet has about 3 million layers of graphene.
Assuming that half of the graphite can be dipped each time, in theory, only 22 dips are needed to obtain a single-layer graphene sample.
But practice is different from theory. In real operations, even if it is performed tens of thousands of times, let alone 22 times, there is no guarantee that graphene can be separated from graphite.
When the tape is stained to a certain extent, the naked eye cannot see whether there are graphite particles on the tape.
The smallest unit of length that a normal human eye can distinguish is 0.1 millimeter. With the help of a 10x magnifying glass, the maximum length is 0.01 millimeter, which is one hundredth of a millimeter.
No matter how small an object is, you need a microscope to see it.
Atoms are on the nanometer scale, 1 millimeter is equal to one million nanometers, and can only be observed using an electron microscope.
In other words, during the operation of tearing off the tape by hand, the thickness of the graphite on the tape is less than 0.1 mm, which is no longer visible to the naked eye. You need to use a magnifying glass to see it. If the thickness is less than 0.01 mm, you will need an optical microscope.
Zhang Wei put a piece of tape into the spectrometer. This is his today's result.
The spectrometer started working, and data was generated on the monitor after a while. Zhang Wei immediately brought the data into the software for calculation, and concluded that the thickness of the graphite on the tape was 35 microns.
“The diameter of a carbon atom is less than 1 nanometer, which means there are thirty to forty thousand layers of graphene on this piece of tape!”
From three million layers to three to four Ten thousand layers seems to be a huge progress, but Zhang Wei knows that the real difficulty is still behind. The closer to success, the more difficult the experiment will be.
The last layer may require more sweat than the previous 2.99 million layers.
Zhang Wei stretched and looked at the wall clock on the wall. The hour hand had already pointed to five o'clock. He immediately turned off the spectrometer and computer, put on his coat and left the rental house.
Today is Ye Haotian’s eighteenth birthday. In the evening, Ye Haotian entertained guests at the restaurant to celebrate that he finally no longer has to study pediatrics.
The place to eat is in Zhongguancun, not far from Zhang Wei’s rental house. When Zhang Wei arrived, several classmates had already arrived in advance.
After all, Ye Haotian is a sufferer of social awkwardness. He just invited some of his close classmates to his birthday and set up three tables. There were even a few female Bodhisattvas who came uninvited and brought gifts. Came here specifically to celebrate Ye Haotian's birthday.
Chen Ming still looked at a loss. Such an occasion is really too scary for an autistic person.
Until Zhang Wei pushed a bottle of beer in front of Chen Ming, the world of the autistic person suddenly became brighter!
After a glass of beer, an autistic person feels that various physics formulas begin to dance in front of his eyes.
After pouring two glasses of beer, the theory of relativity began to emerge in his mind.
After three glasses of beer, the only thing left in the autistic man’s mind is quantum physics and the origin of the universe!
Then he got drunk! He has a well-established character who is good at food and loves to drink.
But today's protagonist is Ye Haotian. Everyone is talking and laughing around the high-quality human male. No one cares about the poor autistic man who is drunk under the table.
After having enough wine and food, the next project is to go to KTV to show off your singing voice.
"Brother Haotian, I won't go." Zhang Wei supported the autistic man and continued: "Chen Ming is so drunk, we can't leave him behind, someone has to help him Go back!"
"That's right. Let me send you the KTV address and come back to me after you settle down with Chen Ming!" Ye Haotian said.
After saying goodbye to everyone, Zhang Wei wanted to take the autistic man back to the dormitory, but the autistic man who was completely drunk seemed to be a fat man weighing 200 kilograms, and it was so heavy!
"The journey back to Zijing Apartment is a bit long. Carrying him for such a long distance makes me tired and I have to lie down. How about taking him back to the rental house, which is closer at least!"
Zhang Wei was careful again. After looking at the autistic man's condition, he was indeed unconscious. There should be no risk of exposing him to graphene if he was brought back to the rental house.
Take the autistic man back to the rental house, Zhang Wei put him into the bedroom, and then covered the autistic man with the quilt.
The autistic person was really drunk today, completely in a coma, and did not recite the theory of relativity in his mouth.
Central heating has started in Beijing in November. It is probably because the heating has just started and the pipes have not heated up yet, so the heating effect is average. It is only 18 degrees in the rental house, which makes it a bit cold to sleep.
The only quilt was returned to the autistic person. Zhang Wei thought it was better to go out and continue the experiment! Tearing off tape by hand is a physical job. After working your muscles and bones, you won't feel cold.
The process of tearing off tape by hand is boring and boring. Repeating it over and over again is like sitting next to an assembly line. Zhang Wei didn't bother to count how many times he had completed the operation. He put on his headphones, pressed the start button of the MP3 player, and immersed himself in the music.
I don’t know how long it took, but he yawned a little tired, twisted his shoulders, and planned to pour a glass of water.
The moment he turned around, he suddenly discovered that a figure was standing behind him, watching him silently.
“Holy shit!” Zhang Wei exclaimed, trembling with fright.
If someone suddenly appears from behind, everyone will be startled. If you don’t believe it, look back now!
I don’t know when the autistic person woke up, and quietly came behind him.
“I’m shocked, why are you walking silently?” Zhang Wei patted his chest to calm down his shock.
"I was afraid of disturbing you, so I didn't dare to say anything." The autistic man paused for five seconds before continuing to explain: "Last time we drank beer, Ye Haotian said I was too noisy and asked me to move in. Stop talking."
"Nonsense, you memorized the theory of relativity all night last time, can you stop making noise!" Zhang Wei instinctively wanted to cover the tape he had just torn off, but now he was surrounded by There are no handy items.
So Zhang Wei asked vigilantly: "How long have you been looking at the back?"
"Twelve minutes and thirty-eight seconds!"
He is indeed a physics genius, he can even remember a few seconds like this clear.
"Then what did you see?" Zhang Wei then asked.
“I saw you doing experiments!”
"No, I was just tearing off the tape!" Zhang Wei quickly defended. "You are just doing an experiment." The autistic man said seriously.
"I'm just bored and want to see if these tapes are strong and sticky enough." Zhang Wei continued to make nonsense.
"You are trying to get that black thing through the tape. You are doing an experiment."
Zhang Wei hesitated for a few seconds and sighed helplessly: "Okay, I’m doing an experiment!”
Although I am autistic, I am not stupid! Not only is he not stupid, he is also a genius who can enter the laboratory with the professor in his freshman year.
"Chen Ming, what you saw today, you won't tell others, right?"
At this time, Zhang Wei only hopes that Chen Ming can keep the secret.
"If you don't let me say it, then I won't say it." Chen Ming's answer was straightforward.
Zhang Wei let out a sigh of relief: "Then you must never tell anyone, not even to anyone, not even Ye Haotian."
The autistic man nodded expressionlessly.
Zhang Wei still trusts the promises made by autistic people, and when meeting strangers, this guy doesn't even dare to say anything, and there is no need to worry that he will leak the secret.
The autistic man looked at the test bench, pointed at a piece of graphite, and asked: "What is this?"
"Highly oriented pyrolytic graphite." Zhang Wei handed the graphite casually. He gave it to the autistic man and then said, "Take it and play with it. This thing is cheap, retailing for one yuan a piece, and wholesale discounts."
The autistic man pointed to the tape on the table again: "I It depends on your operation, it’s a bit urgent.”
"A little anxious? What are you anxious about? Are you in a hurry to go to the toilet?" Zhang Wei said.
"You are handicapped, but I am impatient!" The autistic man took a step forward, walked to the operating table, and continued: "I will do it!"
"This operation process, you can ”
“After watching it for twelve minutes and thirty-eight seconds, I learned it.”
The autistic man said, already starting to tear off the tape.
Looking at the autistic man's smooth operation, Zhang Wei had to admit that in this world, talent is far more important than hard work!
I have been tearing off tape here for a month. In terms of operation speed, it is not as good as this autistic man who only watched for twelve minutes and thirty-eight seconds!
Zhang Wei couldn't help but look at his hands: "Am I really handicapped?"
......
There is an autistic person tearing off tape, Zhang Wei can Free your hands and observe to what extent the sample is stuck on the tape.
Put the tape under an electron microscope, and a black substance appeared on the display, which was graphite stained on the tape.
Then Zhang Wei picked up another piece of tape and continued to observe. It was the same as the previous piece, and it was still black graphite.
The third piece, the fourth piece, the fifth piece... more than a dozen pieces of tape in succession are all like this.
Until the fifteenth piece of tape, a slightly different color appeared on the monitor screen. The graphite on it will not be pure black, but will have a hint of brown.
"Dark brown, am I right?" Zhang Wei twisted his eyes and confirmed again.
It does have brown graphite!
For a moment, Zhang Wei felt as if his heart was in his throat, and even his breathing became rapid.
Graphite is black, while graphene appears light brown under an electron microscope.
From black to dark brown, then to brown, and finally to light brown, it means that the thickness of the graphite is getting thinner and thinner, which means that the graphene is getting closer and closer.
This sample, which is a little brown, is the thinnest thing he has extracted so far.
At this moment, Zhang Wei finally saw the dawn of success.
“It’s almost time, dark brown color has appeared, we should be very close to successfully extracting graphene!”
Zhang Wei clenched his fists excitedly, and then took this precious sample Taken it off.
At this time, Zhang Weicai discovered that the handwritten number on the sample was not his own notes. And here, apart from myself, there are only autistic people.
"This piece of tape was just torn off by Chen Ming! This guy can tear off such a sample for the first time, he must have the attributes of koi!"
Zhang Wei could not wait to step forward and shut the person up in person.
"Brother Chen Ming, teach me, how did you tear off this piece of tape, such as the technique, strength, etc., did you knock on the door?"
The autistic man was silent. After half a minute, he finally said: "Be fierce!"
"Breasts? You mean, use the power of your chest muscles?"
"I mean, be fierce! Like me This way.”
The autistic man said with a ferocious expression on his face as he ruthlessly tore off a piece of tape.
Before I knew it, I had written more than 3,000 words. In fact, I have always felt that 2K chapters cannot contain too much content, so I prefer writing big chapters that can explain things clearly. I have ordered several of my previous books. Old readers of the book should also know that I am used to posting long chapters after they are released, and the number of words is enough to make them enjoyable. However, there is nothing we can do during the public period, so I hope you will understand.
(End of this chapter)