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Programmable Motion and Separation of Single Magnetic Particles on Patterned Magnetic Surfaces


  • The authors thank Greger Ledung for fruitful discussions, and Lina Illiminsky is acknowledged for construction of the electromagnets used in this work. This work was supported by the Swedish Research Council and the Swedish Foundation for Strategic Research. Supporting Information is available online from Wiley InterScience or from the author.


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Motion of single micrometer-sized magnetic particles on patterned magnetic surfaces is controlled by a rotating magnetic field (see Figure and cover). Patterns of thin-film magnetic elements are tailored to form transport lines. Individual particles are separated by adding junctions to the transport lines. The method can improve existing applications in biotechnology and generate new ones in life sciences.

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