According to the Daily Scientific News report on February 24th, the research team led by Sharon Groutz, a professor of chemical engineering, materials science and engineering at the University of Michigan, USA, is solving a key problem in the field of nanotechnology. Just letting nanoparticle spins induces them to form what scientists call "living rotating crystals," which may be used as nanopumps to transport substances within the device; it can also explain the origin of life. Scientists call this kind of crystal "living" because, to a certain extent, they themselves adopt a very simple rule to present the form of life.
Because nanoparticles are small, the commonly used method of construction is not practical. Scientists, including Glotz, have been exploring methods to make disorder naturally and orderly, just as life began. . Glotz said: "If we find a way, then we can not only use new methods to make materials and equipment, but also understand how the first living structure was produced from a group of chemical soups. Biology solved this assembly. The challenge is to continuously add components that have energy, so we also use this approach to handle nanoparticles."
Researchers recently discovered that if particles start to gain energy from basic movements (such as moving in one direction), then they will interact with each other to form a group, and the Glotz team hopes to see that rotating particles will What happened? Researcher Daphne Klotsa said: "The results show that they will self-assemble."
Scientists explain that particles can be thought of as two sets of windmills placed on a tabletop. Air blows a windmill clockwise and another windmill rotates counterclockwise. When the distance between the windmills is sufficiently close that their blades touch each other, the windmill starts to divide itself into clockwise and counterclockwise groups, and they call this behavior phase separation.
This separation occurs because of the way the blades of the windmill collide with each other. When a pair of windmills spin in one direction, their blades meet. In fact, they move in the opposite direction. This means that the blades will join each other, causing the windmill to rotate like a windmill. On the contrary, when the blades of the windmills with opposite spin directions meet, they are actually moving in the same direction. Therefore, they do not join together. Windmills with the same spin direction need to spend more time together, and they will slowly cluster.
When the windmill is divided into a clockwise group and a counterclockwise group, the boundary between the two groups becomes the unobstructed boulevard where the particles without spins can pass, and the leaves at the boundary will make these particles reach the boundary, making them difficult to return. To denser windmills. Scientists said that this phenomenon is expected to be used as a nanopump to transport objects in the device.
The team believes that although computer simulations are two-dimensional, rotating particles can also become "living" three-dimensional crystals, and therefore, can be used to explain the origin of life. (Liu Xia)
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