Micropumps based on alternating high-gradient magnetic fields

A magnetic particle pumping scheme based on high-gradient magnetic fields i s proposed, and its operation principle is demonstrated. The pumping action is generated by sequentially displacing the magnetic held distribution and its dragging force on the magnetic particles immersed in a solution. No me chanical moving parts are needed, and thus, the proposed system can provide a fast, reliable, and inexpensive way for on-chip biomedical testing and a nalysis application, In this paper, the analysis, design, and experimental results are described.