Academician * *, Vice President of China Academy of Sciences and Director of Academic Committee of Nanotechnology Research Center, said: "The development of electronic technology has changed the life style of human beings in the 20th century. Modern information technology has a great influence on people's lives, and nanotechnology will greatly affect people's lives in 2 1 century, and its influence will be much higher than that of computer technology, which will be an unexpected effect. "

Nanotechnology seems mysterious, but it is actually very close to us.

In daily life, in the near future, people don't have to wash clothes with waterproof and oil-proof nano-materials, and this kind of clothes is very comfortable to wear, unlike raincoats; The red flag made of this material will fly high outdoors even if it rains. Coating nano-coatings on various plastics, metals, lacquerware, even polished marble, glass walls of buildings and TV screens will have the effects of antifouling and dustproof, and it is scratch-resistant, wear-resistant and fireproof. In the cold winter, wearing glasses coated with nano-coating can prevent people from entering the room from the outside. Tableware such as teacups made of nano-materials will not be easily broken. If antibacterial substances are nano-treated, they can be added in the production process to make antibacterial daily necessities, such as antibacterial underwear and antibacterial teacups that have appeared in the market now. If nanotechnology is applied to cosmetics, the effect of skin care and beauty will be better. How to make anti-fading lipstick can develop high-grade cosmetics that can prevent scalding.

In medical treatment, nanoparticles will make the transportation of drugs in the human body more convenient. Smart drugs wrapped in several layers of nanoparticles can actively search and attack cancer cells or repair damaged tissues after entering the human body. Wrapping nanoparticles around artificial organs can prevent rejection after transplantation; New diagnostic instruments using nanotechnology can diagnose various diseases by using protein and DNA in a small amount of blood. With the nano-medical robot entering the human body through blood vessels, the pain of patients' surgery will be greatly reduced.

In the field of electronic information, nanotechnology will play a more important role. Nanotechnology will increase the capacity and speed of VLSI by 65,438+0,000 times and reduce its volume by 65,438+0,000 times. It can be predicted that after the widespread use of nano-materials, the computer will process information faster and more efficiently, and will become a real "handheld computer". Twenty or thirty years later, nano made the library as big as a lollipop; Nanotechnology will develop personal office systems, so that we don't have to go to work every day.

Nanotechnology will also make great achievements in energy, transportation and environmental protection. Batteries made of nanomaterials are small, but they can store a lot of energy. By then, cars can run on the street by battery power like toy cars at present. Tires made of nano-materials will be more wear-resistant and anti-slip, which can reduce traffic accidents. Small planes made of nano-materials will make planes enter homes like cars, and traffic jams may become a thing of the past. In the field of environmental science, nano-films with unique functions will appear, which can detect the pollution caused by chemical and biological agents and eliminate the pollution through filtration.

Nanotechnology will change people's clothing, food, housing, transportation, medicine, production, entertainment and other aspects, and the current high-tech fields such as computers, networks and genetic engineering will also face changes. Nanotechnology brings the fifth industrial revolution of human society. The arrival of the nano era will make our life and work more arbitrary.

What is nanotechnology?

. Nanometer is the unit of length, and the symbol is nm. 1 nm = 10-9 m (one billionth of a meter), which is about the length of 10 atoms. Suppose that a hair has a diameter of 0.05 mm and is divided into 50,000 hairs on average in the radial direction, and the thickness of each hair is about 1nm.

. 1, the meaning of nanotechnology

The so-called nanotechnology refers to a brand-new technology to study the motion laws and characteristics of electrons, atoms and molecules in the scale of 0. 1~ 100 nanometers. In the process of studying the composition of matter, scientists found that several or dozens of countable atoms or molecules isolated on the nanometer scale show many new characteristics, and the technology of manufacturing equipment with specific functions by using these characteristics is called nanotechnology.

The main differences between nanotechnology and microelectronics are: nanotechnology studies the realization of specific functions of equipment by controlling single atoms and molecules, and it works by using the fluctuation of electrons; Microelectronics technology mainly realizes its function by controlling the population of electrons and works by using the particle nature of electrons. The purpose of people's research and development of nanotechnology is to achieve effective control of the entire micro-world.

Nanotechnology is a comprehensive subject with strong cross-cutting, and its research content involves the vast field of modern science and technology. From 65438 to 0993, the International Steering Committee of Nanotechnology divided nanotechnology into six sub-disciplines: nanoelectronics, nanophysics, nanochemistry, nanobiology, nanofabrication and nanometrology. Among them, nano-physics and nano-chemistry are the theoretical basis of nano-technology, and nano-electronics is the most important content of nano-technology.

2. Who has a composition about nanotechnology? In the past few years, we have witnessed the rapid development of science and technology in our great motherland, which makes me feel extremely proud to be a China native. I remember a long time ago, there was almost only one purpose of mobile phones, that is, making phone calls. But a few years ago, mobile phones have changed a lot, not only in appearance, but also in many uses. They can be used to take photos, have meetings, surf the Internet, send short messages and so on, which makes our life more convenient and makes me more aware of the power of technology. However, I am just a fledgling student. But I want to think about technology and the future from the perspective of a student.

From the dream of genetic engineering to the promise of nanotechnology to ensure that you don't have to wash clothes; From the warmth of artificial intelligence "give you a lovely robot dog" to the wonder of transgenic technology "let mice grow human ears", new technologies are constantly being born, and every discovery of new technologies will make people ecstatic, because these new technologies are gradually improving our lives and let us know ourselves better. In the near future, China completed the whole genome sequencing of SARS virus for the first time, which is recognized as the most harmful disease in the world at present. But why can't other countries finish it first, while our country has just finished it? Quite simply, this shows that our country is not behind others, nor worse than others. Looking back on our motherland's past, from a country that has just started reform and opening up to a big country with a leading scientific and technological level, our motherland has experienced many ups and downs and experienced many difficulties and bumps, but our motherland has survived because we firmly believe that science and technology can not only change our destiny, but also change our future.

For our generation, the general feeling given to the society is a strong sense of competition and sufficient motivation to learn. Popular science knowledge is the focus of our attention, Einstein, Hawking and Bill Gates are the stars in our minds, and computer science, modern physics and chemical kinetics are influencing us all the time. We have understood the importance and universality of science and technology.

Although the prospect of technology creating a new life is fascinating and fascinating. But in the final analysis, it depends on the concerted efforts of all of you, Qi Xin. As the backbone of the future construction of the motherland, the burden on our generation of young people is really not light, and new opportunities are always accompanied by risks and challenges. However, we will not give up easily. We swear to our predecessors with our youth that we will never live up to their hopes.

Looking back at the course of civilization, it is the light of science and technology that sweeps away the darkness of ignorance in human history, and it is the fire of science that ignites the burning hope in human hearts; Science and technology support civilization, science and technology create the future, and the future is in our hands. Let's become explorers of knowledge, let's roam on unknown roads, and let's use our creativity to make the world we live in a better place.

3. Ask for a 600-word composition about high technology being nano. The teacher asked us to write a short article about nano. Besides knowing that this is a kind of high technology, I also heard about what nano-materials are made of in the news. There are also some enterprises specializing in research and development in the industrial park, but I really can't say what it is, so I can only look it up online.

Nanometer is a unit of length, originally called nanometer. Like centimeters, decimeters and meters, it is a unit of measurement for length.

It is four times the size of an atom and less than the length of a single bacterium. For example, suppose that the diameter of a hair is 0.05 mm, and it is cut into 50,000 pieces on average in the radial direction, and the thickness of each piece is about one nanometer.

The performance of electronic devices manufactured by nanotechnology is much better than that of traditional electronic devices: the working speed of nano-electronic devices is 1000 times that of silicon devices. Low power consumption, the power consumption of nano-electronic devices is only11000 of that of silicon devices.

There is a lot of information storage. On a 5-inch CD less than the size of the palm of your hand, you can store all the books of at least 30 Beijing libraries. Small size and light weight can greatly reduce the size and weight of various electronic products.

Nano-materials are "violent", nano-metal particles are flammable and explosive, and several nano-metal copper particles will burn and explode violently when exposed to air. Therefore, the powder of nano-metal particles can be used to make high explosives, and the solid fuel made of rockets can produce greater thrust.

Nano-metal blocks are compressive and tensile, and their strength is ten times higher than that of ordinary metals, and they can be stretched several times. Used to make airplanes, cars and ships, the weight can be reduced to one tenth.

Nano-satellites will fly into the sky and cut and build materials freely according to people's wishes in a nano-sized world. This technology is called nano-machining technology. Nanomachining technology can integrate different materials. It not only has the function of a chip, but also can detect electromagnetic waves. At the same time, it can complete the instructions of the computer, which can greatly reduce the weight and volume of the satellite, make it easier to launch and lower the cost.

The development of nanotechnology has led to many new disciplines related to nanotechnology. It turns out that nano has such a great effect, which is really amazing.

Mankind has entered the high-tech era, and technology is indispensable in people's lives. However, while people worship and trust it, high technology has also brought unexpected negative effects to human life, and people will advocate returning to nature and pursuing the original meaning of life.

In the past 100 years, the way we live in time has been constantly changing, especially in the past 10 years. More than a century ago, there was no electricity, telephone and e-mail. Everyone worked at sunrise, stayed at sunset, ate his own food and worked near home.

Speaking of time, it is said that time flies; Talking about the past never seems to end; Teach children proverbs such as "haste makes waste"; . It takes several weeks for a letter to travel from one end of the United States to the other, but it takes longer to wait for a reply.

In today's high-tech era, consumer technology constitutes the foundation of our life. Ask yourself, are you willing to completely change your lifestyle and stop using some basic consumer technologies? Take cooking as an example.

You take out a bag of Italian jiaozi from the freezer, pour it into a pot of boiling water on the gas stove and turn on the fire. Take out another can of spaghetti sauce from the refrigerator, put it in a plastic container and heat it in the microwave oven.

In another pot, stir-fry crispy bread with cheese and nine-story tower. This dinner is easy to cook and delicious.

Put the dishes in the dishwasher and you can go to the computer to prepare the materials for tomorrow's meeting. Stove, refrigerator, microwave oven, dishwasher, computer, natural gas, electricity and tap water.

Are you willing to give up these? Our life depends so much on technology that we naturally want more.

4. "Nanotechnology in My Eyes" is a new word. 1 nanometer is equal to one billionth of a meter. After this phenomenon was discovered by scientists, many new products were made: nano-clothes and so on. However, what makes us most curious is the two nanowires of scientist Li. To understand the situation, listen to the following breakdown.

That day, Miss Li entered the classroom with great interest, with a slight smile on her face. As soon as she saw it, she knew that there were good things today, either free activities or interesting things. Ha ha, as I expected, the teachers here are usually moody, but as the saying goes, the road is long, and everyone loves them! I touched his temper and learned many tricks. As soon as the teacher spoke, I saw his throat! No, it's a little exaggerated. Let's get down to business. )

"Today, I gave my classmates an interesting experiment." As soon as this was said, all the students suppressed their inner curiosity and waited for the experiment. I saw that Teacher Li first took out a piece of concave paper from his pocket, then took out two so-called nanowires (in fact, you can't tell whether they are real wires), tied the two nanowires to two raised squares on the concave paper, and then held the nanowires with his hands, pulling and pulling, and the squares moved with Teacher Li's hands. "What is this?" The students talked about it one after another, and the classroom was crowded with people.

Well, since the students are discussing it, I can't fall behind. First of all, there are definitely no nanowires except our county. If there are nanowires in this terrible place of Guantang, thank God! Well, then, let me sum up the students' guesses:

1. Use hair. I think that's absolutely impossible, because there is very little hair, but it is black, I can see it. So, I can swear on the top of my head that it is definitely not hair.

2. Use white silk thread. Then I think it's impossible, because although it's white and small, I can always see a little. But this time I dare not say yes with my head. ]

3. There are no nanowires, but they are rubbed with paper. Miss Li cut a large square paper into concave paper, and the small square in the middle was not cut off. In this way, he rubbed the small square in the middle up and down with one hand and pulled it with the other hand. This explanation seems reasonable, but if you think about it carefully, something will go wrong, so the students behind Mr. Li Can saw through this trick, but in fact the students in the fourth group didn't.

Alas, after all, Miss Li is my father and teacher. I can't say that he eats more salt than I do.

It can be said that he eats more food and has more experience than me! When he opens his mouth, I'm at best.

Look at the tip of his tongue, students are willing to lose. Go ahead, teacher, please point out the maze!

5. Wonderful nanotechnology and our basic necessities. My day is 400 words

"Bell-"this familiar and annoying voice rang after all. I struggled to open my sleepy eyes and a new day began.

When the alarm clock rang for the second time, I reluctantly got dressed and went to the bathroom to clean my dusty face after a night's rest. After washing, I was waiting for a delicious breakfast prepared by my mother early. After a quick bite, I put on my coat and ran to the cram school.

What I want to learn in the morning is Olympic Mathematics. Faced with a mountain of mathematical formulas and competition questions like that day, I racked my brains. Although my body didn't move, my mind kept moving in the solar system like the earth. After an hour and a half, I don't know how many brain cells I spent, and I was so tired that I was dizzy.

After lunch in a hurry at noon, I will go to the summer social practice activities organized by the school-visiting the nursing home to express my condolences to the lonely elderly. Several companions and I went to the nursing home to visit the elderly with fresh fruits and various gifts. We learned about the negative situation of the old people's diet and daily life, and also introduced our daily life and study to the old people. Listening to the moving stories that the old people told us when they were young. Our body and mind are also relaxed from tension. Finally, we took photos with each other, leaving an eternal moment.

In the afternoon, I had to learn English with a whole body of fatigue. Faced with boring A\B\C\D, lines of grammar, piles of exercises. The teacher would explain to us in front, but we sat in the seats below for two hours, but it seemed like two centuries.

In the evening, I think I can have a rest and relax myself. But faced with a mountain of exercise books and review tasks, you have to sit at your desk and study late into the night.

Learning is like sailing against the current. If you don't advance, you will retreat. If we want a bright future, we can't steal or rob. I can only study hard and struggle in tension and busyness.