These Microscopic Bots Could Swim through the Bloodstream to Deliver Drugs

Scientific American ------ Microscopic machines that swim through the bloodstream to deliver drugs or perform minor surgeries have been a dream of scientists for decades. In the past 15 years researchers have created micro-engine variants that rely on chemical reactions, magnetism or vibration for thrust --- but they often motor around erratically. The main challenge is guiding them to where they are needed, says University of Hong Kong chemist Jinyao Tang. Tang and his team have made progress on that front with a micro swimmer that can be smoothly and precisely steered with the help of light. For more on Microscopic Bots that could swim through the bloodstream to deliver drugs click on the picture below to read more.