Researchers have developed a microfluidic platform that enables the control and sorting of particles and biological cells using magnetic energy barriers. This system employs a rotating magnetic field to manipulate the movement of superparamagnetic microparticles and cells labeled with them, offering a precise method for transport and separation in microfluidic environments.

The technique relies on the creation of dynamic magnetic energy barriers that can be modulated to guide particle movement. By applying an external rotating magnetic field, forces are induced that allow particles to overcome or be retained by these barriers, thus facilitating their directional transport or sorting. This approach is particularly relevant for biomedical applications, where controlled cell manipulation is crucial.

Experiments demonstrated the platform's ability to switch particle transport between different pathways and to sort cells with high efficiency. The precision in controlling particle movement opens new possibilities for the development of lab-on-a-chip diagnostic devices, cell therapies, and fundamental biological studies requiring the individual or group manipulation of biological micro-objects.