(P8): Atomic scale engines: Taking a turn
M. Porto, M. Urbakh, and J. Klafter, Acta Phys. Pol. B 32, 295-306 (2001).
(XXIV International School of Theoretical Physics `Transport Phenomena from Quantum to Classical Regimes´, Ustron, Poland, September 25 to October 1, 2000)
You would like to see the engines at work? Have a look at the engine's page!
You might also be interested to read the Physics News Update No. 490, Story No. 1: `Atomic Scale Locomotives´ or Nature Science Update of July 3, 2000: `Fast forward`.