Magnetic ratchet for biotechnological applications

Auge, A.; Weddemann, A.; Wittbracht, F.; Hütten, A.
May 2009
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p183507
Academic Journal
Transport and separation of magnetic beads are important in “lab on a chip” environments for biotechnological applications. One possible solution for this is the on-off ratchet concept. An asymmetric magnetic potential and Brownian motion of magnetic beads are required for such a ratchet. The asymmetric magnetic potential is achieved by combining an external magnetic field with a spatially periodic array of conducting lines. In this work finite element method simulations are carried out to design this asymmetric potential and to evaluate transport rates. Furthermore, experiments are carried out so as to compare to the simulation results.


Related Articles

  • Design of Non-destructive Pulsed Magnets at the HLD. S. Zherlitsyn; T. Herrmannsd�rfer; Y. Skourski; A. Sytcheva; J. Wosnitza // Journal of Low Temperature Physics;Mar2007, Vol. 146 Issue 5/6, p719 

    In this paper, we consider several aspects of the design and construction of non-destructive pulsed magnets on the basis of work which is under way at the Dresden High Magnetic Field Laboratory (HLD). A number of pulsed magnets including 60?T/1.5?MJ and 70?T/8.5?MJ mono-coils have been...

  • Large-scale and highly accurate magnetic field analysis of magnetic shield. Takahashi, Y.; Wakao, S.; Kameari, A. // Journal of Applied Physics;4/15/2006, Vol. 99 Issue 8, p08H904 

    This paper describes a large-scale and highly accurate magnetostatic field analysis targeting a magnetic shield. The hybrid finite element–boundary element method and the magnetic moment method do not require mesh division for the free space and can easily treat the nonlinearity of...

  • SMART ELECTROMAGNETIC SIMULATIONS: GUIDELINES FOR DESIGN OF EXPERIMENTS TECHNIQUE. Bouchekara, H. R. E. H.; Dahman, G.; Nahas, M. // Progress in Electromagnetics Research B;Sep2011, Vol. 31, p357 

    Electromagnetic design problems usually involve a large number of varying parameters. A designer can use different kinds of models in order to achieve optimum design. Some models, e.g., finite-element model, can be very precise: however, it requires large computational costs (i.e., CPU time)....

  • Modeling and analysis of a magnetically levitated synchronous permanent magnet planar motor. Kou, Baoquan; Zhang, Lu; Li, Liyi; Zhang, Hailin // Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07E706 

    In this paper, a new magnetically levitated synchronous permanent magnet planar motor (MLSPMPM) driven by composite-current is proposed, of which the mover is made of a copper coil array and the stator are magnets and magnetic conductor. The coil pitch Ï„t and permanent magnet pole pitch...

  • Three-dimensional reconstruction of surface-breaking flaws using finite element methods. Gladchtein, R. Schifini; Bruno, A. C. // AIP Conference Proceedings;2000, Vol. 509 Issue 1, p897 

    We present an iterative algorithm that reconstructs the geometry of three-dimensional surface-breaking flaws from measurements using an NDE magnetic flux leakage technique. Several surface-breaking flaws in a ferromagnetic sample have been modeled using the finite element method and later...

  • Magnetic field computation in hysteretic media by the finite element method, using the Preisach model. Ostiguy, J.-F.; Silvester, P. P. // Journal of Applied Physics;4/15/1985, Vol. 57 Issue 8, p3853 

    Presents a study on magnetic field computation in hysteretic media by the finite element method using the Preisach model. Introduction to the finite element method; Derivation of equations; Details of the implementation of the Preisach model; Conclusion.

  • The strategic dual image method: An extremely simple procedure for open field problems. Saito, Y.; Takahashi, K.; Hayano, S. // Journal of Applied Physics;4/15/1988, Vol. 63 Issue 8, p3366 

    Discusses the relationship between strategic dual image and traditional electric image methods for the finite element solution of open boundary problems. Value of the net magnetic field source in the problem region of the strategic dual image method; Use of first-order triangular finite...

  • New vector finite elements for three-dimensional magnetic field computation. Barton, M. L.; Cendes, Z. J. // Journal of Applied Physics;4/15/1987, Vol. 61 Issue 8, p3919 

    Presents information on a study which addressed the three-dimensional magnetic field problems using vector finite-element approximation function. Interface between different materials of permeabilities; Results and discussion; Conclusions.

  • Analytical Approach to Simulation of Magnetic Particle Inspection of Defects with Various Shapes and Sizes. Melikhov, Y.; Lee, S. J.; Jiles, D. C.; Garton, M.; Lopez, R.; Brasche, L. // AIP Conference Proceedings;2005, Vol. 760 Issue 1, p586 

    In this work we studied the influence of a various surface defects on results of magnetic particle inspection (MPI). Test materials for an MPI simulation were assumed to have isotropic constant permeability. In order to generate magnetic flux leakage signals from different surface cracks of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics