Have you ever seen a liquid magnet? If magnetic material is ground into an extremely fine powder, with a particle size of about 10 nanometers (see Nanoguitar for more information on length units), and suspended in a liquid, the resulting magnetic suspension is called a ferrofluid. Ferrofluid, with permanent magnets underneath (photo courtesy of Felice Frankel, MIT)
Felice Frankel is a Senior Research Fellow in the Faculty of Arts and Sciences at Harvard University, where she heads the Envisioning Science program at Harvard's Initiative in Innovative Computing (IIC). She holds a concurrent appointment as a research scientist at the Massachusetts Institute of Technology. Working in collaboration with scientists and engineers, Frankel's images have been published in over 300 journal articles and/or covers and various other publications for general audiences.
Incanto della scienza: una selezione di 30 immagini presenta per la prima volta in Italia l'opera di Felice Frankel (Genova, Festival della Scienza 2004)