This latest video feature explores the biomedical applications of magnetic nanoparticles, a multidisciplinary field of endeavour that's witnessed rapid growth over the past five years. Kevin O'Grady, professor of physics at the University of York, UK, puts the technology in perspective by explaining how advances in chemistry and a better understanding of the underlying physics of magnetic nanoparticles have led to a boom in clinical applications.

For readers interested in finding out more about this field of research, Journal of Physics D: Applied Physics has just published a cluster of three review articles on the biomedical applications of magnetic nanoparticles. The reviews are free to download until November 2010.

• See also Magnetic nanoparticles: biomedical progress.