Publication No: 3475Search all ORC publications    

Fluid dispensing using superparamagnetic beads

B.Husband, A.G.R.Evans, T.Melvin

Dept. Electronics and Computer Science and Optoelectronics Research Centre,
University of Southampton, UK

Abstract

The aim of this investigation is to produce an injection device for precise dispensing of nanolitre volumes of fluid using a piston formed from superparamagnetic beads. A plug of Fe2O3 beads is formed by applying a non-uniform magnetic field from a bullet magnet within close proximity to the fluid filled channel containing the beads. Once the plug is formed it can be moved through the micro channel by moving the magnet and thus, provide a plunger-like action. Fluid is displaced by moving the magnetic plug, providing a technique for fluid dispensing.


16th MicroMechanics Europe Workshop, MME Gothenburg, Sweden 4-6 Sep (2005) Poster

Southampton ePrint id: 261206

 

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Copyright University of Southampton 2006