How many millimeters are nanometers?

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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, is to study the properties and applications of materials with structural dimensions ranging from 1 to 100 nm. As far as specific substances are 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. Nanotechnology includes the following four main aspects:

1. Nanomaterials: When a substance reaches the nanometer scale, which is about 1- 100 nanometer, the properties of the substance will suddenly change and special properties will appear. This kind of material with special properties different from the original atoms, molecules and macroscopic substances 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 cosmic space, and often ignored this intermediate field, which actually exists in nature in large quantities, but did not realize the performance of this scale range before. Japanese scientists were the first to truly recognize its characteristics and introduce the concept of nano. In 1970s, they prepared ultramicro ions by evaporation, and found that a kind of conductive copper-silver conductor lost its original properties after being made into nano-scale, neither conducting electricity nor conducting heat. 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, is applied to micro-sensors and actuators of belt-driven machinery, optical fiber communication systems, special electronic equipment, 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, doing experiments on the interaction between biomolecules with interdigital electrodes on the surface of silica, 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.

3. Nano-electronics, including nano-electronic devices based on quantum effect, nano-electronics.

Edited on 202 1-03- 17.

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Information about nanotechnology

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Materials about 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, is to study the properties and applications of materials with structural dimensions ranging from 1 to 100 nm. As far as specific substances are 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. Nanotechnology includes the following four main aspects: 1. Nanomaterials: When a substance reaches the nanometer scale, which is about 1- 100 nanometer, the properties of the substance will suddenly change and special properties will appear. This kind of material with special properties different from the original atoms, molecules and macroscopic substances 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 cosmic space, and often ignored this intermediate field, which actually exists in nature in large quantities, but did not realize the performance of this scale range before. Japanese scientists were the first to truly recognize its characteristics and introduce the concept of nano. In 1970s, they prepared ultramicro ions by evaporation, and found that a kind of conductive copper-silver conductor lost its original properties after being made into nano-scale, neither conducting electricity nor conducting heat. 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, is applied to micro-sensors and actuators of belt-driven machinery, optical fiber communication systems, special electronic equipment, 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, doing experiments on the interaction between biomolecules with interdigital electrodes on the surface of silica, 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. 3. Nano-electronics, including nano-electronic devices based on quantum effect, nano-electronics.

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Introduction to nanotechnology ~ ~

Due to the immeasurable economic and social benefits brought by nanotechnology, including the continuous development and improvement of electronics and optoelectronics in the information industry; Provide better and cheaper materials for manufacturing, national defense, aviation and environmental applications; In order to accelerate the biological progress in medical treatment, medicine and agriculture, human beings can predict that by 2 1 century, nanotechnology will change the characteristics of man-made objects and produce an industrial revolution. John Armstrong, the former chief scientist of IBM, wrote in 199 1 that "I believe that nanotechnology will be the center of the next information age, just like the revolution caused by Meguiar's in the 1970s". The development of nanotechnology is of great significance, which will change the traditional mode of production of human beings, improve social productivity, and may fundamentally solve many serious problems facing human beings at present, such as environmental pollution, ecological balance destruction, raw materials and energy consumption. At the same time, nanotechnology can develop the potential information and structural potential of materials, and improve the information storage and processing capacity per unit volume of materials by more than one million times. Therefore, its economic and social benefits are immeasurable, and it will inevitably become the core of the next information age. China's research in the field of nanotechnology has also started. China Academy of Sciences and China Vacuum Society held a seminar to discuss the development strategy of nanotechnology in China. The development of nano-materials has been included in the climbing plan, the "863" plan, the key research plan and the torch plan. Nano-fabrication and STM research on DNA structure are also listed as the major basic research projects of China Academy of Sciences during the Eighth Five-Year Plan. Last year, the Ministry of Science and Technology launched the national key basic research project of nano-materials, and invested tens of millions of funds to support basic research. China has its own nanotechnology products, and has established more than 10 production lines of nanomaterials and technologies. Recently, Shenzhen Zhongxing Automobile Manufacturing Co., Ltd. has successfully developed a nano-super battery and started small-scale production. Its products are far superior to Ni-Cd, Ni-MH and Li-Mn batteries in conductivity, power storage capacity, continuous discharge time, volume and weight, and cost. Jiangsu Changzhou Wuling Changtai Nano-material Co., Ltd. is jointly established by Jiangsu Wuling Diesel Engine Co., Ltd., Jiangsu Changtai Chemical Group Company, Northwest University and General Institute of Chemical Industry. It is the first high-tech enterprise in China to produce nano-zinc oxide by homogeneous precipitation method, and has realized industrial production. China has also made new breakthroughs in the research of nano-materials properties. The team led by Lu Ke, a researcher from Shenyang Institute of Metals, Chinese Academy of Sciences, has prepared a large number of high-density and high-purity nano-copper with a grain size of only 30 nanometers for the first time in the world, and directly observed the superplastic ductility of nano-metal materials at room temperature. The Institute of Chemistry of Chinese Academy of Sciences has applied the research results of nanotechnology to the textile industry. The treated fabric has changed the nature of "love and hate oil and water (or hydrophilic or oleophilic)" in the past, and realized "pro" and "double hate". Compared with ordinary LCD, the display made of nano-materials of Xi Jiaotong University has the advantages of energy saving, high definition and light weight, and can be used to produce wall-mounted TV sets. Nanotechnology is an energy-saving, low-consumption and technology-intensive high-tech. Although there is still a long way to go to fully realize its industrialization, the time for the appearance of nano-materials is not too long, and the equipment and means for studying nano-materials are available in China. China can seize this once-in-a-lifetime historical opportunity and catch up with the international advanced level. For specific research work, according to foreign experience, it is very important for researchers from different disciplines to cooperate to meet the needs of nanotechnology research and achieve new breakthroughs.

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Information about nanotechnology!

According to the current research status of nanotechnology, there are three concepts about nanotechnology. The first is 1986, the molecular nanotechnology put forward by American scientist Dr. drexler in his book The Machine of Creation. 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 its limit in theory. This is because if the line width of the circuit is reduced, the insulation film forming the circuit will be extremely thin, which will destroy 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 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. Nanotechnology is a comprehensive subject with strong cross-cutting, and its research content involves the vast field of modern science and technology. Nanotechnology now includes nano-biology, nano-electronics, nano-materials, nano-mechanics, nano-chemistry and other disciplines. From micro-technology including microelectronics to nano-technology, people's understanding of the micro-world is getting deeper and deeper, and people's understanding and transformation level of the micro-world has reached an unprecedented height. Qian Xuesen, a famous scientist in China, also pointed out that the structure around nanometer and below nanometer is a key point in the next stage of scientific and technological development, which will be a technological revolution, thus causing another industrial revolution in 2 1 century.

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Who has information about nano?

Nanometer is the unit of length, and the symbol is nm. 1nm =1nm = 10 m (billionth of a meter), which is about the length of10 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. The significance of nanotechnology-1. 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. The meaning of nanotechnology -2 nanotechnology nanotechnology is actually a technology that uses a single atom.