Take a small nanometer-sized rod, find a way to make it rotate as fast as possible, and control it as accurately as possible, and you will get a nanomotor. One day it will be used to build nanobots or complex nanostructured materials. The nano-motors have made great progress in recent years. There have been smaller, more reliable nano-motors, and they can be powered in different ways, including electricity, magnetic fields, photonic blasting, ultrasonics, and so on. Atv And Utv Shock Absorber,Retrofit Shock,Utv Shock Absorber,Atv Shock Absorber ZHEJIANG ROADTAMER AUTO PARTS INC , https://www.road-tamer.com
Previous studies have shown that the combination of ultrasonic and magnetic fields can control the spin and forward movement of nanorods, but no one knows how fast they spin. Scientists at the National Institute of Standards and Technology (NIST) found that gold nanorods immersed in water and applied high-frequency ultrasound can reach 150,000 revolutions per minute, about 10 times faster than previous records. It may cause significant advances in the application of nano-engines in medicine, high-speed machining, and material agitation. The gold rods used by the researchers were 2 microns long and 300 nanometers wide. The nanorods were immersed in water and mixed with polystyrene nanoparticles and ultrasonically applied directly above the vibrating sieve at a frequency of 3 MHz. Nanoparticles begin to rotate, accompanied by vortexes generated by polystyrene nanoparticles. Scientists infer the rod speed by measuring the speed of polystyrene particles.
The original intention of nanomotors was medical applications, and later extended to high-speed processing and material mixing. The researchers will then focus on the interaction between the motor rotation and the surrounding vortex. The nanorod size used in the experiment must be precisely controlled. In fact, even small changes in size will cause great deviations.