Publication

Long-range transport of magnetic microbeads using simple planar coils placed in a uniform magnetostatic field

Martinus Adela Maria Gijs, Amar Rida, Victor Fernandez Gomez
2003
Journal Articles

Abstract

We propose an approach for magnetic microbead transport in microfluidic channels over long-range distances using an array of simple planar coils. The latter are placed in a uniform static magnetic field, the role of which is to impose a permanent magnetic moment to the microbeads. The very small magnetic field gradient of a simple planar coil is then sufficient to displace the microbeads. The long-range displacement is assured by arranging adjacent coils in the array with spatial overlap in a three-phase actuation scheme.

Official source

https://infoscience.epfl.ch/entities/publication/7ea46967-dab7-4a38-bdbd-ef0e6dfff2c8

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Martinus Adela Maria Gijs, Amar Rida, Victor Fernandez Gomez
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7ea46967-dab7-4a38-bdbd-ef0e6dfff2c8

About this result

Related concepts (32)

Magnetic moment

In electromagnetism, the magnetic moment is the magnetic strength and orientation of a magnet or other object that produces a magnetic field. Examples of objects that have magnetic moments include loops of electric current (such as electromagnets), permanent magnets, elementary particles (such as electrons), composite particles (such as protons and neutrons), various molecules, and many astronomical objects (such as many planets, some moons, stars, etc).

Magnetic field

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field. A permanent magnet's magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets.

Demagnetizing field

The demagnetizing field, also called the stray field (outside the magnet), is the magnetic field (H-field) generated by the magnetization in a magnet. The total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents. The term demagnetizing field reflects its tendency to act on the magnetization so as to reduce the total magnetic moment.

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Long-range transport of magnetic microbeads using simple planar coils placed in a uniform magnetostatic field

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