microrobots
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Microrobots use the power of bacteria to avoid obstacles
We don't need to scale down Google's self-driving system to make microrobots that can swim in fluid while avoiding obstacles. Drexel University professor MinJun Kim and his team of engineers have discovered how to use bacteria to do so. See, Serratia marcescens, the flagellated microorganism commonly associated with urinary tract and respiratory infections, carries a negative charge. If you smear that on a tiny chip, you get a negatively charged microrobot that can stay afloat (thanks to the bacteria's flagella) and swim around by riding electric fields applied to its environment.
Six tiny robots can pull a two-ton car
Stanford university's uBots have pulled off a feat that makes ants look like slackers. Working in concert, six of the robots managed to tow a 3,900 pound car, despite weighing just a half-ounce each -- much less than other car-towing robots. The secret, according to the team, is biomimicry. The wee bots are designed to imitate gecko lizards with sticky feet that can support a heavy load but still detach easily. In previous experiments, that allowed them to climb up walls and pull heavy weights. This time, the robots are channeling ants by working as a team to pull a heavy load.
Researchers use graphene to draw energy from flowing water, self-powered micro-robots to follow?
What can't graphene do? The wonder material's been at the heart of a stunning number of technological breakthroughs of late, and now it's adding oil exploration to its long list of achievements. A team of researchers at Rensselaer Polytechnic Institute have discovered that the flow of good old H2O over a sheet of graphene can generate enough electricity to power "tiny sensors" used in tracking down oil deposits. The gang, led by professor Nikhil Koratkar, was able to suck 85 nanowatts of power out of a slab of graphene measuring .03 by .015 millimeters. The little sensors the researchers speak of are pumped into potential oil wells via a stream of water, and are then put to work sniffing out hydrocarbons indicative of hidden pockets of oil and natural gas. Of course, that doesn't have a whole lot of practical application for your average gadget consumer, but Koraktar sees a future filled with tiny water-powered robots and micro-submarines -- we can dig it.
