Scientists at Oxford University showed people how the natural activities of bacteria can be used to assemble and supply energy to microscopic wind farms, or to power other man-made micromachines, such as mobile phone parts. This research has been published in the journal Science Progress and uses computer simulations to show that the disorderly gathering effect of dense active substances such as bacteria can be organized to promote the hidden rotor and provide a stable source of energy.
The researchers said that these bio-powered generators will later see the development of micro-motors powered by micro-artificial equipment that can self-assemble self-powered, from light switches to cell phone microphones.
Dr. Tyler Shendruk, one of the authors of the University of Oxford's Department of Physics, said that many of society's energy challenges are in the GW class, but some are completely microscopic. One possible way to generate trace amounts of electricity for micromachines may be to obtain them directly from biological systems such as bacterial suspensions.
Dense bacterial suspensions are typical active fluids that can flow autonomously. Since swimming bacteria can swim and promote disorderly flow of life, they are normally too disorderly to extract useful energy from them.
However, when the Oxford research team immersed this active fluid with 64 symmetrical micro rotors, the scientists discovered that the bacteria spontaneously organized around the rotor and began to rotate in the opposite direction. This was a simple old-fashioned wind. The structure of the farm.
Dr. Shendruk added that it is interesting that we do not need to pre-design miniature gear-shaped turbines. These rotors will assemble themselves called a bacterial wind farm. When we simulate with a single rotor in bacterial turbulence, it will only be rushed by. However, when we put a group of rotors into the active fluid, they suddenly form a regular pattern, and the adjacent rotors rotate in opposite directions.
One of the authors, Dr. Amin Doostmohammadi of the University of Oxford's Department of Physics, said that the ability to obtain micro-mechanical work from these microbial systems is valuable because they do not require input energy and can be performed using internal biochemical processes.
At the micro level, our simulations show that the flow generated by the biological assembly can reorganize itself so that it can produce long-lasting stable mechanical capabilities to rotate a group of rotors.
One of the authors, Dr. Julia Yeomans of the Department of Physics at Oxford University, said that nature is wonderful when it comes to creating micro-engines. If we can understand how to develop similar designs, the prospects are very broad.
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