Researchers at the American Physical Society in Boston has presented an army of microbots that are about the size of a speck of dust.They can walk and survive harsh conditions.
Microbots is the field of miniature robotics,in particular mobile robots with characteristic dimensions less than 1 mm.The term can also be used for robots capable of handling micrometer size components.
The microbots were developed using a technique wherein they placed layers of titanium and platinum on a silicon wafer.Whenever they applied an electrical voltage,the platinum contracts while the titanium remains rigid.This reaction is what became the motor that enables the robot to move.
Further,researchers skipped the batteries and instead powered their tiny robots by shining a laser on the solar panels behind their backs.Since these microbots are manufactured using silicon,scientists can incorporate sensors that will enable the microbots to measure temperature and electrical pulses.
It is expected that microbots will be useful in applications such as (a)looking for survivors in collapsed buildings after an earthquake (b)crawling through the digestive tract (c)crawl into cell phone batteries and clean and rejuvenate them and (d)helpful to neural scientists by looking into the brain to measure nerve signals
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