Microswimmer propels itself with near-zero friction

Scientists have found that a very slender micro-sized swimmer can propel itself without friction by surface treadmilling. The microswimmer moves by generating backward surface motion at the front end of itself, which is then consumed at the rear end. Because the surrounding fluid remains nearly motionless, the only possible friction stems from the motion of the front and rear ends.

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<p><a href="http://www.physorg.com/news100176842.html">Microswimmer propels itself with near-zero friction</a></p> <p>Scientists have found that a very slender micro-sized swimmer can propel itself without friction by surface treadmilling. The microswimmer moves by generating backward surface motion at the front end of itself, which is then consumed at the rear end. Because the surrounding fluid remains nearly motionless, the only possible friction stems from the motion of the front and rear ends.</p>