Material Empire

The two stayed in the jewelry store for less than 10 minutes and fled. Choosing jewelry also requires some skills, and Qin Hai and Tranquility undoubtedly lack such skills.

According to Qin Hai's original idea, it is just a diamond ring. It doesn't matter if you buy expensive and not right. As long as you can make a beautiful woman smile, what is it for the wealthy Qin Chairman Qin?

It is a pity that practice and theory are too far apart. When more than a dozen different grades of diamond rings were placed in front of them, Qin Hai deeply understood what it means to be picky eyes. With the backing of high-end diamond rings, those low-end goods are obviously inconceivable. But when they set their sights on diamond rings with titles such as "Queen of India" and "Eye of Africa", they found that the price of these diamond rings was suffocating.

Qin Hai was ready to make a little bit of "blood", but he still couldn't persuade himself to face the high price of one million dollars. The annual salary of an ordinary worker in China is only more than 1,000 yuan, and a diamond ring is equivalent to a worker's 1,000-year salary. Qin Hai is no longer able to spend so much money to buy an accessory.

As for tranquility, when I saw the price of the diamond ring, my face was scared, so how dare to accept the clerk's invitation to try it on. Towards the end, the two had to find an excuse to slip away with awkward expressions.

"Giggle ..." After running out of the jewelry store for dozens of meters, I was sure that no clerk looked at them outside the door, and then Tranquility slowed down, holding Qin Hai's arm, smiling back and forth.

"What are you laughing at?" Qin Hai was a little embarrassed. As a handsome rich man who vowed to buy a diamond ring to marry him, he was frightened by the price of jewelry and escaped. It was really shameless.

"Qin Hai, you said that you are also a big boss with billions of dollars. Why can't you buy a $ 1 million diamond ring?" Serenity said ridiculously, she seemed to have forgotten from the jewelry store just now. When she escaped, she ran faster than Qin Hai, afraid that she would have to spend a lot more to look at it.

"Is this price too ridiculous? I don't see the difference between the diamond called" Princess Rose "and other diamonds, but the color is a bit more transparent than other diamonds, so the price is expensive A dozen times? "Qin Hai muttered." Even if I have money, it doesn't mean that I should be the head of injustice. "

Quietly retorted: "What is the injustice, people are jewelers for hundreds of years, can you still understand the price of jewellery? Do you understand the principle of a penny? You don't think that 'Princess Rose' is better than anything Is your diamond good-looking? You can see it by comparison. "

"Don't you really like it?" Qin Hai said earnestly. "If you really like it, then let's go back and buy it now. You're right, it's not too much of a million dollars."

"Don't stop, I'm talking about play." Serenity quickly denied. From the heart, of course, she likes beautiful diamonds, but if she wants to spend $ 1 million to buy a diamond, it is beyond her mental capacity. Anyway, she was also a child growing up in an ordinary working family, and she received a frugal education from an early age. Even now that her family has money, her boyfriend Qin Hai is a billionaire, and she hasn't developed a habit of big hands.

"If I spent 1 million to buy a diamond ring for you, Lao Ning would train me to death, not to mention others." Qin Hai made excuses for his uncle. However, this excuse is indeed true. If he buys this diamond ring, Ning Zhongying will definitely become furious. By then, he and Tranquility will be scolded by Ning Zhongying. With his knowledge of Ning Zhongying, knowing that this is definitely not alarmist.

"Okay Qin Hai, do you dare to call my father Lao Ning now?" Tranquility warned, staring.

"I didn't call it first. Was your brother Fat called it privately?" Qin Hai decisively sold Ning Mo.

Tranquil laughed: "Speaking of my brother, I remembered it, how did you buy it when you accompanied my brother to buy a diamond ring? Why didn't you hear that you escaped that time?"

"That's in Pujiang." Qin Hai explained, "We went to the best jewelry store and asked the shop assistant to get the best diamond ring as soon as I went. Then the fat man looked at it and said that it looks good, the price is not expensive, and I bought it. The best diamond ring in the store, which is more than 170,000 yuan, and the co-authorship is only more than 30,000 US dollars. I also planned this just now, but who knows that the diamond ring in Paris is so expensive. "

"That store also had more than 30,000 US dollars of diamond rings just now. Why don't you buy them?" Quietly raised the bar.

Qin Hai shook his head: "Here, more than 30,000 US dollars are the first-class. If I pick the most inferior, why don't I leave a handle?"

"Are you afraid of falling back?" Serenity laughed. In her mind, in fact, I feel that buying the cheapest diamond ring in a store is a bit uncomfortable. After all, diamond rings are accessories with special meanings, and you can't set a handle.

"In fact, it's not a matter of letting go of the conversation, but I think this thing is not worth so much money." How much graphite can I buy, why don't we make a graphite ring ourselves? "

The so-called allomorphs are substances with different physical properties made of the same element. Diamonds and graphite have exactly the same chemical composition and are made of carbon. It is only because of the difference in the arrangement of carbon atoms that one diamond becomes the king of hardness and the other becomes soft graphite. Qin Hai said that diamond and graphite are the same thing.

Tranquility was laughed at by Qin Hai's brain hole, and she pointed at Qin Hai and said, "You can't figure it out, do you still plan to cut graphite into thin slices to make a ring ring? Those who know say I wear It ’s a diamond allotropy, and people who do n’t know thought I was wearing a thimble. ”

Qin Hai's nonsense purpose was just to cover up the previous embarrassment. Seeing that the quiet attention had been successfully drawn away, he also breathed a sigh of relief, saying, "Actually, it is not impossible to cut graphite into thin slices. If you cut it thin enough ... "

Speaking of which, he stopped suddenly, staring at tranquility, his eyes rolling round.

"What's wrong? Is there anything on my face?" Tranquility was disturbed by Qin Hai's move, and he reached out and wiped his face subconsciously, but he didn't see anything dirty on his hands.

"It's not the face, I mean ... why did you think of cutting graphite into thin slices?" Qin Hai asked indignantly.

"Is there anything wrong with cutting graphite into thin sheets?" Tranquil said strangely. "If you want to make a ring, don't you need thin sheets? ... Qin Hai, wouldn't you really want to make a graphite ring?"

"Why not?" A strange smile appeared on Qin Hai's face. "If I can cut graphite very thin, as thin as one atom, the ring made must be very beautiful and very strong."

"Qin Hai, are you okay?" Quiet and unknown, he reached out and pushed Qin Hai a hand, said, "How can it be possible to cut out graphite that is only one atom thick, wouldn't you say carbon nanotubes?"

The so-called carbon nanotubes refer to an elongated tubular material formed by curling a single-layer or multi-layer graphite sheet. The inner diameter is generally less than 3 nanometers and the length is about 1 micrometer. This material was discovered by a Japanese scholar in 1991 when observing the product of an arc vacuum-evaporated graphite electrode with a high-resolution electron microscope. Subsequently, many scholars invented several preparation methods to make it an important new nanomaterial.

With different diameters and helix angles, carbon nanotubes can exhibit conductive, semi-conductive, and insulating characteristics, respectively, and can be used to make electronic components at the sub-level. It also has high strength and elasticity, and is very light, so it may be used to make lightweight high-strength fibers. Science fiction writers have envisioned building an elevator between the earth and the moon to facilitate shuttles. Some people have pointed out that if you want to make such an elevator, the ideal material is carbon nanotube fibers.

Regarding carbon nanotubes, there is another very interesting situation, that is, its light absorption ability is extremely strong. Some scientists have used nano carbon control to make materials that are said to be able to absorb light completely. In other words, the light shines on this material without any slight reflection, so it can be called the darkest material in the world.

Tranquility is doing superconducting research, and once concerned about new materials such as carbon nanotubes, but she couldn't think of it ~ www.readwn.com ~ Why did Qin Hai inexplicably think of such a material? Is it because she said Sentence "Cut graphite into thin slices"?

Qin Hai gave a negative answer to the quiet speculation: "It is not a carbon nanotube, but a two-dimensional material. It is a thin film formed by the interconnection of carbon atoms, which is as thin as one carbon atom. .If you think about it, what kind of performance would such a thin material have. "

"Thin film material as thick as 1 atom?" Serenity frowned, thinking, and said, "I can't imagine such a material. If it is only 1 atom thick, will it be fragile? I doubt it Can it exist in reality? "

"Nanotubes are 1 atom thick, but they are rolled into a tube. If carbon nanotubes are cut and flattened, aren't they just 1 atom thick sheets? Do you think the strength of the carbon nanotube How about it? "

Qin Hai revealed serenity with a smile, in fact, he didn't need any answer from serenity, because he knew the characteristics of the material he described very well. This material is a new type of material that has stirred up in the field of materials science and even in the economic field in the first ten years of the 21st century:

Graphene! You are reading, if any!