Sun, 27 Jul 2008 08:02:34 BST CiteULike: dchen's Petrov http://www.citeulike.org/user/dchen/author/Petrov CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/2867640 <i>Physical Review Letters, Vol. 100, No. 21. (2008)</i><br /><br />We propose a model for a novel artificial low Reynolds number swimmer, based on the magnetic interactions of a pair of ferromagnetic particles: one with hard and the other with soft magnetic properties, connected by a linear spring. Using a computational model, we analyze the behavior of the system and demonstrate that for realistic values of the parameters involved, the swimmer is capable of self-propelling with average speeds of the order of hundreds of micrometers per second. Ferromagnetic Microswimmers Feodor Ogrin Peter Petrov Peter Winlove doi:10.1103/PhysRevLett.100.218102 Physical Review Letters, Vol. 100, No. 21. (2008) 2008-06-05T20:32:23-00:00 2008 Physical Review Letters 100 21 APS 2008 cool microrheology http://www.citeulike.org/user/dchen/article/963666 <i>Physical Review Letters, Vol. 97, No. 21. (2006)</i><br /><br />We report the statistical analysis of the movement of a submicron particle confined in a harmonic potential in the presence of a torque. The absolute value of the torque can be found from the auto- and cross-correlation functions of the particle's coordinates. We experimentally prove this analysis by detecting the torque produced onto an optically trapped particle by an optical beam with orbital angular momentum. Torque Detection using Brownian Fluctuations Giovanni Volpe Dmitri Petrov doi:10.1103/PhysRevLett.97.210603 Physical Review Letters, Vol. 97, No. 21. (2006) 2006-11-27T18:32:15-00:00 2006 Physical Review Letters 97 21 APS 2006 focus opticaltweezer rotation