Origin of multiplexing capabilities of multifrequency magnetic ratchets.

Yuyu Ouyang,1,* Mukarram A. Tahir,2 Daniel J. Lichtenwalner,3 and Benjamin B. Yellen1,2,† 1University of Michigan–Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, People’s Republic of China 2Department of Mechanical Engineering and Materials Science, Center for Biologically Inspired Materials and Material Systems, Duke University, Durham, North Carolina 27708, USA 3Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27606, USA (Received 29 October 2011; revised manuscript received 2 April 2012; published 26 April 2012)