LIQUID SCULPTURES with FERROFLUID
SPIKED WITH MAGNETIC NANOPARTICLES
(Image: Linden Gledhill/Cognisys - on Flickr)
Ferrofluids are colloidal mixtures - magnetic nanoparticles suspended evenly throughout a carrier liquid.
When placed in a magnetic field, the suspended particles cause the entire fluid to become strongly magnetized. In these images a small drop of ferrofluid is placed within a magnetic field created by a neodymium iron-boron rare-earth magnet.
The peaks and troughs result as the magnet tries to pull the liquid along its field lines.
Text based on a story in New Scientist 8 November 2010