Abstract
When a magnetic micro-screw moves in water, it is difficult to go up and to control a magnetic microscrew three-dimensionally because of gravity. Therefore, it is important to control density of a microscrew. Therefore, we have developed magnetically photo-curable (MPC) polymer with hollow microcapsules. This polymer enables us to fabricate a three-dimensional magnetic microstructure whose density is controlled. Since we can control density of this resin, buoyancy of microstructure is able to cancel the effect of gravity. To show neutral buoyancy of the magnetic microscrew, we compared vertical swimming velocity of the microscrew with horizontal velocity. This experimental result shows that vertical velocity coincides with horizontal velocity. This result demonstrates that we have succeeded in fabricating a magnetic microscrew and controlling the microscrew three-dimensionally in water.
