1. Nano-materials: When the substance reaches the nanometer level, that is, about 0. 1- 100 nanometer, the properties of the substance will suddenly change and special properties will appear. This kind of material, which is not only different from the original atoms and molecules, but also different from the macro, is called nano-material.
If only nano-scale materials have no special properties, they cannot be called nano-materials.
In the past, people only paid attention to atoms, molecules or space, and often ignored this intermediate field, which actually existed in nature in large quantities, and did not realize the efficiency of this scale before. Japanese scientists were the first people who really realized its efficiency and introduced the concept of nano. They prepared ultramicro ions by evaporation in 1970s. By studying its efficiency, they found that a kind of conductive copper-silver conductor lost its original properties after being made into nano-scale, and it was neither conductive nor thermally conductive. The same is true of magnetic materials, such as iron-cobalt alloys. If the size is about 20-30 nanometers, the magnetic domain will become a single magnetic domain, and its magnetism is 1000 times higher than the original. In the mid-1980s, people formally named this kind of materials as nanomaterials.
Why does the magnetic domain become a single magnetic domain, and its magnetism is 1000 times higher than the original one? This is because the arrangement of single atoms in a magnetic domain is not very regular, but there is a nucleus in the middle of a single atom surrounded by electrons, which is the reason for the formation of magnetism. However, after becoming a single magnetic domain, the single atoms are arranged regularly and show strong magnetism to the outside.
This characteristic is mainly used to manufacture micro-motors. If the technology is developed for a certain period of time and used to manufacture magnetic levitation, a faster, more stable and more energy-saving high-speed train can be manufactured.
2. Nano-dynamics: mainly micro-machines and micro-motors, or micro-electromechanical systems (MEMS), which are used as micro-sensors and actuators for transmission machinery, optical fiber communication systems, special electronic devices, medical and diagnostic instruments, etc. It adopts a new technology similar to the design and manufacture of integrated appliances. The feature is that the parts are very small, the etching depth often needs tens to hundreds of microns, and the width error is very small. This process can also be used to manufacture three-phase motors, ultra-high-speed centrifuges or gyroscopes. In the research, micro-deformation and micro-friction at quasi-atomic scale should be detected accordingly. Although they have not really entered the nanometer scale at present, they have great potential scientific and economic value.
Theoretically, micro-motor and detection technology can reach nanometer level.
3. Nano-biology and nano-pharmacology: for example, using colloidal gold with nano-particle size to fix dna particles on mica surface, using interdigital electrodes on the surface of silicon dioxide to carry out experiments on the interaction between biomolecules, carrying out double-layer planar biofilm of phospholipids and fatty acids, and fine structure of dna. With nanotechnology, you can also put parts or components into cells through self-assembly to form new materials. About half of the new drugs, even the fine powder of micron particles, are insoluble in water; However, if the particles are nanoscale (i.e. ultrafine particles), they can be dissolved in water.
When nano-organisms develop to a certain technology, nano-biological cells with recognition ability can be made of nano-materials, and the biomedical absorption of cancer cells can be injected into the human body for targeted killing of cancer cells. This is an old way of raising money.
4. Nano-electronics: including nano-electronic devices based on quantum effect, optical/electrical characteristics of nanostructures, characterization of nano-electronic materials, and atomic manipulation and assembly. The current trend of electronic technology requires devices and systems to be smaller, faster, colder and smaller, which means faster response. Being colder means that a single device consumes less power. But smaller is not infinite. Nanotechnology is the last frontier of builders, and its influence will be enormous.
Nanometer was first put forward by American scientists, and it is a unit of length; 1 nm = 1 billionth of a meter, which is a microscopic unit of measurement. Nanotechnology refers to the artificial modification of the atomic and molecular configurations of substances at the nanometer level, so that substances have some special properties at the macro level. Nanometer is not matter. When we say nano-materials, we mean special materials that have been transformed by nano-level technology, not materials made of "nano".
What is nanotechnology? Nanometer is a unit of length, originally called nanometer, which is -9 power meter (65438+ billionth meter) of 10. Nanoscience and technology, sometimes called nanotechnology, studies the properties and applications of materials with structural dimensions ranging from 0. 1 to 100 nm. As far as concrete matter is concerned, people often describe things as thin as hair as. In fact, human hair is generally 20-50 microns in diameter, not thin. A single bacterium is invisible to the naked eye, and the diameter measured by a microscope is 5 microns, which is not too fine. At the extreme, 1 nm is roughly equivalent to the diameter of 4 atoms. Suppose that a hair has a diameter of 0.05 mm and is divided into 50,000 hairs on the radial average, and the thickness of each hair is about 1nm.
Nanotechnology includes the following four main aspects:
1. Nanomaterials: When a substance reaches the nanometer scale, which is about 0. 1- 100 nm, the properties of the substance will suddenly change and special properties will appear. This kind of material, which is not only different from the original atoms and molecules, but also different from the macro, is called nano-material. If only nano-scale materials have no special properties, they cannot be called nano-materials. In the past, people only paid attention to atoms, molecules or space, and often ignored this intermediate field, which actually existed in nature in large quantities, and did not realize the efficiency of this scale before. Japanese scientists were the first people who really realized its efficiency and introduced the concept of nano. They prepared ultramicro ions by evaporation in 1970s. By studying its efficiency, they found that a kind of conductive copper-silver conductor lost its original properties after being made into nano-scale, and it was neither conductive nor thermally conductive. The same is true of magnetic materials, such as iron-cobalt alloys. If the size is about 20-30 nanometers, the magnetic domain will become a single magnetic domain, and its magnetism will be 1000 times higher than the original. In the mid-1980s, people formally named this kind of materials as nanomaterials.
Nano-dynamics, mainly micro-machinery and micro-motor, or micro-electromechanical system (MEMS), is used as micro-sensors and actuators for transmission machinery, optical fiber communication systems, special electronic devices, medical and diagnostic instruments, etc. It adopts a new technology similar to the design and manufacture of integrated appliances. The feature is that the parts are very small, the etching depth often needs tens to hundreds of microns, and the width error is very small. This process can also be used to manufacture three-phase motors, ultra-high-speed centrifuges or gyroscopes. In the research, micro-deformation and micro-friction at quasi-atomic scale should be detected accordingly. Although they have not really entered the nanometer scale at present, they have great potential scientific and economic value.
13. nano-biology and nano-pharmacology, such as fixing dna particles on mica surface with nano-sized colloidal gold, conducting experiments on the interaction between biomolecules with interdigital electrodes on silicon dioxide surface, double-layer planar biofilm of phospholipids and fatty acids, and fine structure of dna. With nanotechnology, you can also put parts or components into cells through self-assembly to form new materials. About half of the new drugs, even the fine powder of micron particles, are insoluble in water; However, if the particles are nanoscale (i.e. ultrafine particles), they can be dissolved in water.
Nano-electronics includes nano-electronic devices based on quantum effect, optical/electrical characteristics of nanostructures, characterization of nano-electronic materials, atomic manipulation and atomic assembly. The current trend of electronic technology requires devices and systems to be smaller, faster, colder and smaller, which means faster response. Being colder means that a single device consumes less power. But smaller is not infinite. Nanotechnology is the last frontier of builders, and its influence will be enormous.
1in April, 1998, Dr. Neil Ryan, the president's science and technology adviser, commented that if someone asked me which science and engineering field would have a breakthrough impact on the future, I would say that the start-up plan was to set up a nanotechnology challenge organization to fund interdisciplinary research and education teams, including long-term goal centers and networks. Some potential breakthroughs include:
The data of the entire Library of Congress is compressed into a device the size of a cube of sugar. This is achieved by increasing the storage capacity per unit surface by 65,438+0,000 times and expanding the storage capacity of large storage electronic equipment to the level of several megabytes. Materials and products are from small to large, that is, made up of an atom and a molecule. This method can save raw materials and reduce pollution. Production strength is 10 times that of steel, and the weight is only a small part of steel, so as to make various lighter and more fuel-efficient land, water and air vehicles. Through tiny transistors and memory chips, the speed and efficiency of computers have increased by millions of times, which has made today's Pentium? The processor is already slow. Using genes and drugs to deliver nano-scale mri contrast agent to find cancer cells or locate human tissues and organs, so as to remove the smallest pollutants in water and air, thus obtaining a cleaner environment and drinkable water. The energy efficiency of solar cells has been tripled.
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"Nano" is the translation of English nano technology, and it is the unit of measurement. 1 nanometer is one millionth of a nanometer, that is, 1 nanometer, that is, one billionth of a meter, which is equivalent to the length of 45 atoms strung together. Nanostructures usually refer to tiny structures with the size below 100 nm. After the invention of 198 1 year scanning tunneling microscope, a molecular world with a length of 0. 1 to 100 nm was born, and its ultimate goal is to construct products with specific functions directly from atoms or molecules. So nanotechnology is actually a technology that uses single atoms and molecules to arrange substances.
From the good research so far, there are three concepts about nanotechnology:
The first is the molecular nanotechnology put forward by American scientist Dr. drexler in the book "Creating Machines from 65438 to 0986". According to this concept, we can make the machine of combining molecules practical, so that we can combine various molecules at will and make any molecular structure. The nanotechnology of this concept has not made significant progress.
The second concept defines nanotechnology as the limit of badge processing technology. That is, the technology of artificially forming nano-scale structures through nano-precision "processing". This nano-scale processing technology also makes the miniaturization of semiconductors reach the limit. Even if the existing technology continues to develop, it will eventually reach the limit in theory, because if the line width of the circuit is gradually reduced, the insulation film forming the circuit will become extremely thin, destroying the insulation effect. In addition, there are problems such as fever and trembling. In order to solve these problems, researchers are studying new nanotechnology.
The third concept is put forward from a biological point of view. It turns out that organisms have nano-scale structures in cells and biomembranes.
? Nanotechnology: Nanotechnology is a kind of science and technology that uses a single atom and molecule to make substances. Nanoscience and technology is based on many modern advanced science and technology, and it is the product of the combination of modern science (chaotic physics, quantum mechanics, mesoscopic physics, molecular biology) and modern technology (computer technology, microelectronics and scanning tunneling microscope technology, nuclear analysis technology). Nanoscience and technology will trigger a series of new science and technology, such as nanoelectronics, nanomaterial science, nanomechanics and so on. Nanotechnology is considered as a high-tech at the turn of the century.
? Realize the technical problems with unique functions and intelligent functions, and develop nano-scale detection and control.
? The concept of thinking mode shows that the object of production and scientific research will develop to a smaller size and a deeper level, from micron level to nanometer level.
? The future goal of nanotechnology is to manipulate atoms and molecules and build nanoscale devices or products with certain functions as needed.
? Nanoscience and technology: Also known as nanotechnology, it studies the properties and applications of materials with structures ranging from 0. 1 to 100 nm.
? Nanotechnology is a comprehensive subject with strong cross-cutting, and its research content involves the vast field of modern science and technology. Nano-science and technology mainly includes nano-system physics, nano-chemistry, nano-material science, nano-biology, nano-electronics, nano-machining and nano-mechanics. These seven relatively independent and interpenetrating disciplines and three research fields: nano-materials, nano-devices, nano-scale detection and characterization. The preparation and research of nano-materials are the basis of the whole nano-technology. 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.
Development course of nanotechnology:1July, 1990, the first international nanotechnology conference was held in Baltimore, USA. 65438-0996, the fourth academic conference on nanotechnology was held in China. The first (1992) nano-materials conference was held in Mexico; 1994 the second international symposium on nanomaterials was held in stuttgart, Germany. 1996 held the third international conference in Hawaii, USA; 1998 the fourth nano-materials conference was held in Stockholm, Sweden.
Meeting; In 2000, the 5th International Conference on Nanomaterials was held in Sendai, Japan.
The development of nanotechnology;
? The market size of nanostructured materials with atomic number below 100 is about 500 million dollars.
? The production cost of nanostructured materials is 5 billion to 20 billion dollars.
? A large number of complex nano-structured substances are produced, with a total amount of 100 ~ 100 billion.
? Nanocomputer, 2000 ~ 1000 billion
? Verified components that can manufacture power supply and program self-discipline, 6000 billion.
What is nanotechnology? For nanotechnology? Thank you. With the help of the Great God, nanotechnology studies the properties and applications of materials with structural sizes ranging from 0. 1 to 100 nm. After the invention of 198 1 year scanning tunneling microscope, a molecular world with a length of 0. 1 to 100 nm was born, and its ultimate goal is to construct products with specific functions directly from atoms or molecules. So nanotechnology is actually a technology that uses single atoms and molecules to arrange substances. Nanotechnology is a comprehensive subject with strong cross-cutting, and its research content involves the vast field of modern science and technology. Nano-science and technology mainly includes nano-system physics, nano-chemistry, nano-material science, nano-biology, nano-electronics, nano-machining and nano-mechanics. These seven relatively independent and interpenetrating disciplines and three research fields: nano-materials, nano-devices, nano-scale detection and characterization. The preparation and research of nano-materials are the basis of the whole nano-technology. 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. According to the research so far, there are three concepts about nanotechnology: the first is molecular nanotechnology put forward by American scientist Dr. drexler in his book "The Machine of Creation" in 1986. According to this concept, we can make the machine combining molecules practical, and we can make nano computers and nano robots, so that we can combine all kinds of molecules at will and make any kind of molecular structure. The nanotechnology of this concept has not made significant progress. The second concept defines nanotechnology as the limit of micromachining technology. That is, the technology of artificially forming nano-scale structures through nano-precision "processing". This nano-scale processing technology also makes the miniaturization of semiconductors reach the limit. Even if the existing technology continues to develop, it will eventually reach the limit in theory, because if the line width of the circuit is gradually reduced, the insulation film forming the circuit will become extremely thin, destroying the insulation effect. In addition, there are problems such as fever and trembling. In order to solve these problems, researchers are studying new nanotechnology. The third concept is put forward from a biological point of view. It turns out that organisms have nano-scale structures in cells and biomembranes. The development of DNA molecular computer and cell biological computer has become an important part of nanotechnology.
What is nanotechnology! Urgent! 1nm = 10-9m = 0.0000000 1m。
Microstructure materials, powder materials, semiconductors and so on. Basically still in the research stage.
When the structural volume of some materials is small to a certain extent, the characteristics change, such as the increase of specific surface area and the improvement of activity. Using these advantages, more stable functional materials with fewer defects can be synthesized.
What are nanostructures and nanotechnology? Nanotechnology is a kind of science and technology that uses a single atom and molecule to make substances. It studies the properties and applications of materials with structural dimensions ranging from 0. 1 to 100 nm. Nano-science and technology is based on many modern advanced science and technology, and it is the product of the combination of modern science (chaotic physics, quantum mechanics, mesoscopic physics, molecular biology) and modern technology (computer technology, microelectronics and scanning tunneling microscope technology, nuclear analysis technology). Nano-science and technology will trigger a series of new science and technology, such as nano-physics, nano-biology, nano-chemistry, nano-electronics, nano-processing technology and nano-metrology.
Nanotechnology includes the following four main aspects:
1. Nano-materials: When the substance reaches the nanometer level, that is, about 0. 1- 100 nanometer, the properties of the substance will suddenly change and special properties will appear. This kind of material, which is not only different from the original atoms and molecules, but also different from the macro, is called nano-material.
If only nano-scale materials have no special properties, they cannot be called nano-materials.
In the past, people only paid attention to atoms, molecules or space, and often ignored this intermediate field, which actually existed in nature in large quantities, and did not realize the efficiency of this scale before. Japanese scientists were the first people who really realized its efficiency and introduced the concept of nano. They prepared ultramicro ions by evaporation in 1970s. By studying its efficiency, they found that a kind of conductive copper-silver conductor lost its original properties after being made into nano-scale, and it was neither conductive nor thermally conductive. The same is true of magnetic materials, such as iron-cobalt alloys. If the size is about 20-30 nanometers, the magnetic domain will become a single magnetic domain, and its magnetism is 1000 times higher than the original. In the mid-1980s, people formally named this kind of materials as nanomaterials.
Why does the magnetic domain become a single magnetic domain, and its magnetism is 1000 times higher than the original one? This is because the arrangement of single atoms in a magnetic domain is not very regular, but there is a nucleus in the middle of a single atom surrounded by electrons, which is the reason for the formation of magnetism. However, after becoming a single magnetic domain, the single atoms are arranged regularly and show strong magnetism to the outside.
This characteristic is mainly used to manufacture micro-motors. If the technology is developed for a certain period of time and used to manufacture magnetic levitation, a faster, more stable and more energy-saving high-speed train can be manufactured.
2. Nano-dynamics: mainly micro-machines and micro-motors, or micro-electromechanical systems (MEMS), which are used as micro-sensors and actuators for transmission machinery, optical fiber communication systems, special electronic devices, medical and diagnostic instruments, etc. It adopts a new technology similar to the design and manufacture of integrated appliances. The feature is that the parts are very small, the etching depth often needs tens to hundreds of microns, and the width error is very small. This process can also be used to manufacture three-phase motors, ultra-high-speed centrifuges or gyroscopes. In the research, micro-deformation and micro-friction at quasi-atomic scale should be detected accordingly. Although they have not really entered the nanometer scale at present, they have great potential scientific and economic value.
Theoretically, micro-motor and detection technology can reach nanometer level.
3. Nano-biology and nano-pharmacology: for example, using colloidal gold with nano-particle size to fix dna particles on mica surface, using interdigital electrodes on the surface of silicon dioxide to carry out experiments on the interaction between biomolecules, carrying out double-layer planar biofilm of phospholipids and fatty acids, and fine structure of dna. With nanotechnology, you can also put parts or components into cells through self-assembly to form new materials. About half of the new drugs, even the fine powder of micron particles, are insoluble in water; However, if the particles are nanoscale (i.e. ultrafine particles), they can be dissolved in water.
When nano-organisms develop to a certain technology, nano-biological cells with recognition ability can be made of nano-materials, and the biomedical absorption of cancer cells can be injected into the human body for targeted killing of cancer cells. This is an old way of raising money.
4. Nano-electronics: including nano-electronic devices based on quantum effect, optical/electrical properties of nanostructures, characterization of nano-electronic materials, and atomic manipulation and assembly. The current trend of electronic technology requires devices and systems to be smaller, faster, colder and smaller, which means faster response. Being colder means that a single device consumes less power. But smaller is not infinite. Nanotechnology is the last frontier of builders, and its influence will be enormous.
What is nanotechnology? Is nanotechnology credible? Come on, great gods, every technology will cause different social disputes, depending on your own views. Nanotechnology is a science and technology that uses a single atom and molecule to make substances, and studies the properties and applications of materials with structural sizes ranging from 0. 1 to 100 nm. Nano-science and technology is based on many modern advanced science and technology, and it is the product of the combination of modern science (chaotic physics, quantum mechanics, mesoscopic physics, molecular biology) and modern technology (computer technology, microelectronics and scanning tunneling microscope technology, nuclear analysis technology). Nano-science and technology will trigger a series of new science and technology, such as nano-physics, nano-biology, nano-chemistry, nano-electronics, nano-processing technology and nano-metrology.
About nanotechnology: nm 863. /article/knowledge/mon/2005 05/464。
A card the size of a credit card, as long as it is placed in the refrigerator, can not only remove the odor, but also keep fresh. Fruits and vegetables stored for half a month are still fresh. A seemingly ordinary dress can be waterproof, antifouling and breathable when worn on the body; Cigarettes are harmful to health. After more than ten years of research, scientists have found that nanotechnology can also be used in the production of cigarettes, and the content of harmful substances in smoke can be reduced to one-fifth or even lower than that of ordinary cigarettes. Thanks to the development of nanotechnology, all these long-cherished dreams have now come true.
After reading this, you will definitely have such a question: What is "nano"? What exactly is nanotechnology? What kind of influence will it have in the fields of production, life, military affairs, science and technology? The concepts of nano water, nano smoke, nano refrigerator and nano house often appear in the media and advertisements. What are the real meanings of these concepts?
What is nano?
Let's see how scientists explain it: "In physics, nanometer (nm), also known as nanometer, is a unit of measurement of length, just like centimeters, decimeters and meters. Specifically, 1 nm is equal to the length of one billionth of a meter, which is equivalent to four times the size of an atom and one tenth of the thickness of a hair; Figuratively speaking, an object of 1 nm is placed on a ping-pong ball, just like ping-pong ball is placed on the earth. This is the concept of nanometer length. "
The so-called nanotechnology refers to the science and technology of making new products with nanomaterials. It is the product of the combination of modern science (chaotic physics, quantum mechanics, mesoscopic physics, molecular biology and chemistry) and modern technology (computer technology, microelectronics and scanning tunneling microscope technology, nuclear analysis technology and synthesis technology). Nanotechnology will trigger a series of new science and technology, such as nanoelectronics, nanomaterial science and nanomechanics. In the new century, nano will bring people more tools for production and life with extraordinary functions, and bring people to an unprecedented living environment.
Nanotechnology has changed human life style.
Judging from the research so far, there are three concepts about nanotechnology.
The first is the molecular nanotechnology put forward by American scientist Dr. drexler in the book "Creating Machines from 65438 to 0986". According to this concept, we can make the machine of combining molecules practical, so that we can combine various molecules at will and make any molecular structure. The nanotechnology of this concept has not made significant progress.
The second concept defines nanotechnology as the limit of micromachining technology. That is, the technology of artificially forming nano-scale structures through nano-precision "processing". This nano-scale processing technology also makes the miniaturization of semiconductors reach the limit. Even if the existing technology continues to develop, it will eventually reach the limit in theory.
The third concept is put forward from a biological point of view. It turns out that organisms have nano-scale structures in cells and biomembranes.
Nanotechnology extends the means and ability of human beings to understand and transform the material world to atoms and molecules. Its ultimate goal is to produce products with specific functions directly from the novel physical, chemical and biological characteristics of atoms, molecules and substances on the nanometer scale. This may change the design and manufacturing methods of almost all products and achieve a leap in production methods. Therefore, nanotechnology will have a far-reaching impact on mankind, and even change people's way of thinking and lifestyle. Nanotechnology involves a wide range, among which nanomaterials are the foundation of the development of nanotechnology.
Feyneman, a famous Nobel Prize winner, predicted in 1960s that if the arrangement of objects on a small scale was controlled, objects would acquire many unusual features. Nanomaterials can do this. Nano-materials fundamentally change the structure of materials. At present, nanotechnology has been well applied in many industries and brought great changes to people's lives. In order to ensure a higher and healthier quality of life, the application of nanotechnology has gone deep into the following fields.
Ceramic field: I hope to overcome the brittleness of ceramic materials and make ceramics as flexible and machinable as metals. Many experts believe that if we can solve the technical problem of restraining grain growth in the sintering process of single-phase nano-ceramics, it will have the advantages of high hardness, high toughness, low temperature superplasticity and easy processing.
Microelectronics: Nano-electronics is an electronic system based on the latest physical theory and the most advanced technical means, which is constructed and developed according to brand-new ideas.
The potential ability of materials to store and process information has made a revolutionary breakthrough in information collection and processing. Card readers that can read from hard disks and nano-material memory chips with storage capacity thousands of times that of current chips have been put into production. After the widespread use of nano-materials, computers can be simplified as "handheld computers". Nanoelectronics will be the core of the information age in this century.
Biology: Although molecular computers are only in the ideal stage at present, scientists have considered using several biomolecules to make computer parts, among which bacteriorhodopsin is the most promising. The biomaterial has special thermal, optical, chemical and physical properties and good stability, and its unique optical ring characteristics can be used to store information, thus playing the role of replacing the current computer information processing and information storage, and improving the storage and information processing capacity of the material per unit volume by millions of times.
Optoelectronic field: The development of nanotechnology makes the combination of microelectronics and optoelectronics closer, and greatly improves the efficiency of optoelectronic devices in the transmission, storage, processing, operation and display of optoelectronic information. The application of nanotechnology to the existing radar information processing can improve its capability by 10 to several hundred times, and even put the ultra-high resolution nano-aperture radar on the satellite for high-precision ground reconnaissance.
Chemical field: adding nano-TiO2 _ 2 powder to cosmetics in a certain proportion can effectively shield ultraviolet rays. Adding metal nanoparticles into chemical fiber products or paper can greatly reduce the electrostatic effect. Nanoparticles can also be used as conductive coatings, printing inks and solid lubricants.
Health field: the application of nanotechnology can make the production process of drugs more and more elaborate, and directly use the arrangement of atoms and molecules on the scale of nano-materials to manufacture drugs with specific functions. Nano-material particles will make the transportation of drugs in human body more convenient. Smart drugs wrapped in several layers of nano-particles can actively search and attack cancer cells or repair damaged tissues after entering human body. New diagnostic instruments using nanotechnology can diagnose various diseases by using protein and DNA in a small amount of blood. By studying the application of nanotechnology in biomedicine, we can understand the fine structure of biological macromolecules and their relationship with functions on the nano scale, and obtain life information. Nano 1+ 1 Reduce the harm of smoking.
In order to solve the long-standing problem that smoking is harmful to health and it is difficult to quit smoking, nanotechnology has also been applied to the tobacco industry. According to some data, cigarette manufacturers in Beijing have successfully applied nanotechnology in their mixed 3m *** products, which is one of the earliest products in China to realize the advanced nature of nanotechnology. This nano-product is a low-hazard product jointly developed by Tsinghua University. The product creatively uses modified nano-materials, gives full play to its characteristics of selective catalysis and selective adsorption, effectively reduces the content of harmful substances such as benzo (a) pyrene and N- nitrosamine, which are unique to tobacco and have strong carcinogenic effects, and is supplemented by mature comprehensive coke reduction technology, which greatly reduces the harm of smoking to health. Experts in Tsinghua University summarized the product technology of nano-3mg into two points, which are called "1+ 1" technical concept:
"1", selective catalysis: nano-materials have the characteristics of large specific surface area and many surface active centers, and are ideal materials for catalysts. Cigarette manufacturers in Beijing use the selective catalysis of nano-materials to catalyze and decompose harmful substances in smoke into small molecular harmless substances in nano-products.
"1", selective adsorption: nano-materials with cavity structure have huge specific surface area and special groups, which can selectively adsorb nitrosamines and polycyclic aromatic hydrocarbons with strong carcinogenicity in flue gas.
The comparative test shows that the nano 3m *** product produced by 1+ 1 process can reduce nitrosamines and polycyclic aromatic hydrocarbons with strong carcinogenicity in flue gas by more than 40% and 60% on average, respectively, but the fragrance quality and quantity of the product have not changed obviously.
"Nano" is not an ordinary "rice", it is a new tiny material size discovered by people in long-term scientific exploration. After repeated research, various items made of nano-materials have entered the homes of ordinary people. We believe that in the near future, nano will continue to bring more and more surprises to people, bring more and better production and living conditions, and bring people a comfortable living space that modern people can't imagine.