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. A 5-inch CD less than the palm of your hand 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.
High thinking time
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.
High-tech era
Today, consumer technology forms 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.