This image shows a ferrofluid - a liquid that is magnetic. It consists of nanometer-sized maghemite particles dispersed in a liquid. Maghemite is γ-Fe2O3, a kind of rust. The maghemite is put on a watch glass, with a magnet placed under it. The so-called spikes point in the direction of the magnetic field of the magnet.

This image shows a ferrofluid - a liquid that is magnetic. It consists of nanometer-sized maghemite particles dispersed in a liquid. Maghemite is γ-Fe2O3, a kind of rust.

The maghemite is put on a watch glass, with a magnet placed under it. The so-called spikes point in the direction of the magnetic field of the magnet.