Nanotechnology is all around us
3 paragraphs imitation:
I have seen the beautiful spring flowers, viewing the red Xiangshan red leaves, but never saw the rose such a flower. Roses are so red, red as if the blood of the warrior; roses are so beautiful, beautiful intoxicated; roses are so fragrant, fragrant attracted a few bees; I quietly looked at the fairy-like, delicate roses, so that I was watching me intoxicated there.
I've seen the magnificent sea, enjoying the level of the artificial lake like a mirror, but never seen such water in Huangshan. Huangshan water can be really cool ah, cool pouncing on the face, more than a cool bath in the summer are comfortable; Huangshan water can be really clear ah, clear to see the small fish playing in the water, play; Huangshan water can be really urgent ah, urgent to beat on the rocks, splashing. "Hey! Son, it's time to go up the mountain!" I just remembered that I should go to the mountain.
I've seen the fragrant nightshade, and I've seen the graceful moonflower, but I prefer the strong and unyielding plum blossom, which is so white! Like the snowflakes in winter; the plum blossom is really beautiful! Like a dancing swan, the plum blossom is strong! Like a brave warrior. The strong and unyielding spirit of the plum blossom has always inspired me to move forward.
2. NanotechnologyNanometer is a unit of length, originally called millimeters, which is 10^-9 meters (one billionth of a meter), or 10^-6 millimeters (one millionth of a millimeter).
Nanoscience and technology, sometimes referred to simply as nanotechnology, is the study of the properties and applications of materials with structural dimensions in the range of 1 to 100 nanometers. The nano effect means that nanomaterials have strange or abnormal physical and chemical properties that traditional materials do not have, such as the original conductive copper to a certain nanometer limit is not conductive, the original insulating silicon dioxide, crystals, etc., in a certain nanometer limit when the beginning of conductive.
This is due to nanomaterials with small particle size, large specific surface area, high surface energy, surface atoms accounted for a large proportion of the characteristics, as well as its unique three major effects: the surface effect, the small size effect and macroscopic quantum tunneling effect. For solid powder or fiber, when it has a one-dimensional size of less than 100nm, that is, to reach the nano-size, can be called the so-called nanomaterials, for the ideal spherical particles, when the specific surface area is greater than 60m2/g, its diameter will be less than 100nm, that is, to reach the nano-size.
The study of the specific surface area of nanomaterials is very important, the specific surface area of nanomaterials testing data is only detected using the bet method of detection of the results are true and reliable, there are many domestic instruments can only do direct comparison method of testing, and now the country is also eliminated. At present, domestic and foreign specific surface area testing is unified using multi-point bet method, domestic and foreign specific surface area determination standards are formulated based on the bet test method, please refer to China's national standard (gb/t 19587-2004)-gas adsorption bet the principle of determining the specific surface area of solid material method.
Specific surface area testing is actually a time-consuming task, due to the different adsorption capacity of the samples, some samples may take a whole day to test, if the test process is not fully automated, then the tester can not be left at all times, and to be highly concentrated, observe the instrument panel, control knobs, a little inattention will lead to the failure of the test process, which will waste a lot of valuable time. This will waste a lot of the tester's valuable time.
Auto Synchronization is a key element in the synchronization process.
The real fully automated intelligent specific surface area analyzer products, the testers from the repetitive mechanical operation of the liberation, greatly reducing their work intensity, training is simple, improve work efficiency. The real fully automated intelligent specific surface area analyzer products, greatly reducing the error caused by human operation, improve the test accuracy.
f-sorb 2400 Specific Surface Area Tester is really able to realize the bet method detection function of the instrument (both direct comparison method), more importantly, f-sorb 2400 Specific Surface Area Tester is so far the only completely automated and intelligent specific surface area testing equipment in China, and its test results and the international consistency of the high stability is also good, and at the same time to reduce the human error. It also reduces human error and improves the accuracy of test results. Edit the meaning of nanotechnology - 1. The so-called nanotechnology, refers to the scale of 0.1 ~ 100 nanometers, the study of electrons, atoms and molecules within the laws of motion and characteristics of a new technology.
Scientists, in the process of studying the composition of matter, have found that a few, dozens of countable atoms or molecules isolated at the nanoscale significantly exhibit many new properties, and the technology that utilizes these properties to make devices with specific functions is called nanotechnology. ... The main difference between nanotechnology and microelectronics technology is: nanotechnology research is to control individual atoms and molecules to realize the specific function of the device, is to use the volatility of electrons to work; and microelectronics technology is mainly through the control of the electronic group to achieve its function, is to use the particle nature of electrons to work.
The purpose of people's research and development of nanotechnology is to realize the effective control of the entire microcosm.... Nanotechnology is a highly cross-cutting and comprehensive discipline, and the research involves a broad field of modern science and technology.
In 1993, the International Steering Committee for Nanotechnology divided nanotechnology into six subdisciplines: nanoelectronics, nanophysics, nanochemistry, nanobiology, nanoprocessing and nanometrology. Among them, nanophysics and nanochemistry are the theoretical basis of nanotechnology, while nanoelectronics is the most important element of nanotechnology.
Edit Meaning of Nanotechnology-2 Nanotechnology (nanotechnology nanotechnology) Nanotechnology is actually a technology that makes matter from individual atoms and molecules. From the state of research so far, about nanotechnology is divided into three concepts.
The first one, molecular nanotechnology, was proposed by Dr. Drexler, an American scientist, in 1986 in his book "The Machine of Creation". According to this concept, machines for combining molecules can be made practical so that all kinds of molecules can be combined at will and any kind of molecular structure can be created.
This conceptualization of nanotechnology has not made significant progress. The second concept positions nanotechnology as the limit of micromachining technology.
That is, technologies that artificially form nanometer-sized structures through nanometer-precision "machining". This nanoscale processing technology also brings the miniaturization of semiconductors to its limit.
Even if existing technologies continue to evolve, they will theoretically reach their limits. This is because, if the line width of the circuit is made smaller, the insulating film that makes up the circuit will be extremely thin, which will destroy the insulating effect.
In addition, there are problems with heat and wobble. To solve these problems, researchers are working on new types of nanotechnology.
The third concept was developed from a biological perspective. Originally, organisms have nanoscale structures within cells and biofilms.
The so-called nanotechnology refers to a new technology that studies the laws and properties of motion within electrons, atoms, and molecules at a scale of 0.1 to 100 nanometers. Scientists in the study of the composition of matter in the process, found in the nanometer scale isolated from a few, dozens of countable atoms or molecules, significantly show many new characteristics, and the use of these characteristics of the manufacture of equipment with a specific function of the technology, known as nanotechnology.
Nanotechnology is a highly cross-cutting and comprehensive discipline, and the research involves a wide range of modern science and technology. Nanotechnology now includes nanobiology, nanoelectronics, nanomaterials, nanomechanics, nanochemistry and other disciplines.
From micron technology, including microelectronics, to nanotechnology, human beings are becoming more and more to the micro world.
3. Essay on Nanotechnology (580)Nanotechnology, the latest technology of mankind! Nanotechnology, a brand new term appeared in front of human beings, people can use it in medicine, science.
And so on, it has made great contributions to mankind, and people can be proud of discovering it! Let's take a real example: water sting, the vernacular sting brother, a kind of trespassing to drink human blood animal, let a person is very afraid! It was the summer vacation when I was in the 6th grade, I went fishing in the creek with my brother, my brother said he was very hot, he wanted to go down to take a bath, I said: "Well, you be careful, find shallow water to swim, don't look for deep water!" "Got it!" He said.
After a while, I caught 4 fish, and suddenly I heard my brother yelling for help! I guess he must have fallen into the deep water, I did not expect him to be in the shallow water holding his legs and screaming, I thought he fooled me, only to hear him say, "I was stung by the sting brother stung, and now it's in my legs. I was stung by the stinging brother, and now it's in my leg.
!" I took a look at his leg, and it wasn't? A bulge was writhing in my brother's leg, and I remembered that if I didn't get it out in time, my brother's blood would surely be sucked dry by it! I hit my brother's leg as hard as I could with my hand to get it out, but the more I hit it the more it wormed its way in, and that was the end of it, I fell to the grass. Suddenly, I remembered that there is a health room nearby, so I picked up my brother on my back and flew to the health room, and when I got there, the doctor said that this is a very tricky situation, and I can only try to use the nanobots to force it in to expel the water sting.
After a period of time, the water stings finally back nanobots expelled out of the thrill of the past. Through this incident, I know two things: ① Never go to the river without an adult accompanied by the case of their own.
② Nanotechnology is too useful! Nanotechnology, the latest human technology.
4. Request an article on nanotechnologyNanotechnology
Nano is a unit of length, originally called a millimicron, which is 10's -9th power meter (one billionth of a meter). Nanoscience and technology, sometimes referred to simply as nanotechnology, is the study of the properties and applications of materials with structural dimensions in the range of 1 to 100 nanometers. In terms of specific substances, people tend to use fine as hair to describe slender things, but in fact, human hair is generally 20-50 microns in diameter, which is not fine. Individual bacteria can not be seen with the naked eye, measured with a microscope diameter of 5 microns, is not fine. To summarize, 1 nanometer is roughly equivalent to the diameter of 4 atoms. Nanotechnology includes the following four main aspects:
⒈ nanomaterials: when the material to the nanometer scale, about 1-100 nanometers in this range of space, the performance of the material will undergo a sudden change, the emergence of special properties. This is different from the original composition of the atoms, molecules, but also different from the macroscopic material composition of the special properties of the material, that is, nanomaterials. If only the scale reaches nanometer, and there is no special properties of the material, also can not be called nanomaterials. In the past, people only pay attention to atoms, molecules or cosmic space, often ignoring this intermediate field, which actually exists in large quantities in the natural world, but only previously did not recognize the performance of this scale range. The first real recognition of its performance and cited the concept of nanometer is the Japanese scientists, they used the evaporation method in the 1970s to prepare ultramicro ions, and through the study of its performance found that: an electrically conductive, thermally conductive copper, silver conductor into the nanoscale, it will lose the original nature of the performance of the conductivity of electricity is not conductive, nor is it thermally conductive. Magnetic materials are also so, like iron cobalt alloy, make it about 20-30 nanometer size, the magnetic domain becomes a single domain, its magnetic properties than the original 1000 times higher. the mid-80's, people formally named this kind of material as nanomaterials.
⒉Nanodynamics, mainly micromechanics and micromotors, or always called micro electro-mechanical systems for micro sensors and actuators with transmission machinery, fiber-optic communication systems, special electronic equipment, medical and diagnostic instruments. A new process similar to the design and manufacture of integrated electrical appliances is used. Characterized by very small parts, the depth of etching often requires tens to hundreds of microns, while the width error is very small. This process can also be used to make three-phase motors for ultra-fast centrifuges or gyroscopes, for example. In research there is also the corresponding detection of microdeformations and microfriction at the quasi-atomic scale, etc. Although they are not yet really into the nanoscale, but there is a great potential scientific value and economic value.
Nano-biology and nanopharmacology, such as the mica surface with nanoparticle degree of colloidal gold fixed dna particles, in the silica surface of the fork-finger electrode to do the test of interactions between biomolecules, phospholipids and fatty acids bilayer planar biofilm, the fine structure of the dna and so on. With nanotechnology, self-assembly methods can also be used to put parts or components inside cells to make up new materials. The new drug, even if it is a fine powder of micron particles, is about half insoluble in water; but if the particles are nano-scale (i.e., ultra-micro-particles), they can be dissolved in water.
Singed nanoelectronics, including nanoelectronic devices based on quantum effects, optical/electrical properties of nanostructures, characterization of nanoelectronic materials, and atom manipulation and atom assembly. Current trends in electronics require devices and systems to be smaller, faster, and colder. smaller means faster response time. Colder means that the power consumption of individual devices should be small. But smaller is not without limits. Nanotechnology is the final frontier for builders, and its impact will be enormous.
In April 1998, the President's Science and Technology Advisor, Dr. Neal Lane, commented that if I were asked which area of science and engineering would have a breakthrough impact on the future, I would say that the Initiative would establish a program called the Grand Challenges in Nanotechnology, which would fund interdisciplinary teams of researchers and educators, including centers and networks for the long term. Some of the potential breakthroughs that could be realized include:
Compressing the entire Library of Congress into a piece of equipment the size of a sugar cube, which could be accomplished by increasing the storage capacity per unit of surface by a factor of 1,000 to expand the storage capacity of large storage electronics to the level of a few terabytes. Manufacturing materials and products from a small-to-large approach, i.e., making them from an atom, from a molecule. This method will save raw materials and reduce pollution. Producing materials that are 10 times stronger than steel and a fraction of its weight to make a variety of lighter, more fuel-efficient vehicles for land, water and air transportation. Increase the speed and efficiency of computers millions of times over with tiny transistors and memory chips, making today's Pentium? processors already seem very slow. Use gene and drug delivery nanoscale mri controls to find cancer cells or locate human tissues and organs to remove the tiniest pollutants from water and air, resulting in a cleaner environment and drinkable water. Increase the energy efficiency of solar cells by a factor of two.
5. Does anyone have an essay on nanotechnologyIn the past few years, we have seen the rapid development of science and technology in our great motherland, which makes me feel immensely proud that I am a Chinese. I remember a long time ago, the use of cell phones is almost only one, that is, to make phone calls, but a few years ago, the cell phone has changed a lot, not only the appearance of the beautiful more, but also the use of the cell phone, you can use the phone to take pictures, meetings, the Internet, send a short message and so on a series of things, which makes our lives more convenient, but also let me appreciate the power of science and technology, but I'm just a fledgling student of the "science and technology" two. However, I am only a new student, the content of the word "science and technology" is still limited, I can not use some very esoteric theories to expound on the mystery of science and technology, and I can not go to work on the promise of the elders I can realize the blueprint of science and technology. But I am willing to use a student's perspective to think about technology and the future.
From the genetic engineering "so that people live to a thousand years old" dream, to nanotechnology "package you wear clothes without washing" promise; from artificial intelligence "to send you a cute machine dog From the warmth of artificial intelligence "to send you a cute robot dog" to the wonders of transgenic technology "to let rats grow human ears". There are constantly new technologies in the making, and every new technology discovery makes people ecstatic because, gradually, these new technologies are improving our lives and letting us know more about ourselves. Recently, China firstly completed the sequencing of the whole genome of the SARS virus. SARS is now globally recognized as the most hazardous disease, but why can't other countries complete it firstly while our country has done it on the contrary? Simply, it shows that our country is not backward or inferior to others. Looking back at our motherland's past, from being a country that just started reform and opening up to a big country with leading science and technology level, our motherland has experienced how many storms and how many difficulties and bumps in the road, but our motherland still survived because our motherland believes that
Technology not only changes destiny, but also changes the future.
For our generation, the general feeling of the society is that the sense of competition is strong, and the learning energy is sufficient. Science and technology is the focus of our attention, Einstein, Stephen Hawking, Bill Gates is the star of our hearts, computer science, modern physics and chemistry dynamics is always touching us. We have come to understand the importance of technology and its universality.
While the prospect of technology creating a new life is thought-provoking and mesmerizing. But in the final analysis is to rely on our *** with the efforts to realize. As the backbone of the future construction of the motherland, our generation of young people on the shoulders of the burden is not light, new opportunities are always accompanied by risks and challenges, but we will not easily say to give up, we use our youth to the predecessors swear: never let down the predecessors of our hopes.
Looking back at the course of civilization, it is the light of science and technology that has swept away the darkness of obscurity in human history, and it is the fire of science that has ignited a burning hope in the hearts of mankind; science and technology support civilization, science and technology create the future, and the future is in our hands. Let us become explorers of knowledge, let us roam on the road to the unknown, let me use our creativity to make the world we live in a better place.