ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Micrograph of the surface of ferrofluid, taken with episcopic lighting and Normarski Interference Contrast (DIC). Ferrofluids are colloidal liquids consisting of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a fluid, usually an oil. Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. One application of ferrofluids is to keep dust off of the drive shafts of magnetic disk drives, which it does by creating a liquid seal held in place by magnetic fields. Object size; 0.25 mm.
Model release not required. Property release not required.