“A ferrofluid (from the Latin ferrum, meaning iron) is a liquid which becomes strongly polarised in the presence of a magnetic field.
Ferrofluids are composed of nanoscale ferromagnetic particles suspended in a carrier fluid, usually an organic solvent or water. The ferromagnetic nano-particles are coated with a surfactant to prevent their agglomeration (due to van der Waals and magnetic forces). Although the name may suggest otherwise, ferrofluids do not display ferromagnetism, since they do not retain magnetisation in the absence of an externally applied field. In fact, ferrofluids display paramagnetism, and are often referred as being “superparamagnetic” due to their large magnetic susceptibility. True ferromagnetic fluids are difficult to create at present.”
Daniel Rozin - Wooden Mirror(s), 2003 (above) and 1999 (in the video below).
“An interactive sculpture made up of non-reflective square wooden pixels. The piece reflects any object or person in front of it, moving fast enough to create live animation. Mechanical mirrors are a platform in which Rozin investigates the borderline and contrasts between digital and analog worlds, virtual and physical experience, or order versus chaos. The first of this series, Rozin’s Wooden Mirror explores the inner workings of image creation and human visual perception.Source.”