抄録
An integrated magnetic micro-mixer, which consists of embedded micro-conductors and a micro-channel, is developed by using MEMS technology for the mixing of magnetic beads in bio-fluids. In the previous report, it was shown that the simple 2-D micro-conductors provided a magnetic field strong enough to attract the nearby magnetic beads. Numerical simulation is used to search for the channel and electrode design that can generate chaotic trajectories of beads. It is found that the serpentine channel geometry with the perpendicular electrode arrangement is able to create the stretching and folding of material lines, which is a sign of chaos. Similar patterns are observed experimentally in the chaotic mixing in the fabricated device.
