A novel device is designed for on-chip selective trap and two-dimensional remote manipulation of single and multiple fluid-borne magnetic particles using field controlled magnetic domain walls in circular nanostructures. The combination of different ring-shaped nanostructures and field sequences allows for remote manipulation of magnetic particles with high-precision along any arbitrary pathway on a chip surface.
Sarella, A., Torti, A., Donolato, M., Pancaldi, M., & Vavassori, P. (2014). Two-Dimensional Programmable Manipulation of Magnetic Nanoparticles on-Chip. Advanced Materials, 26(15), 2384-2390. https://doi.org/10.1002/adma.201304240