“Ferrofluids are colloidal liquids made of nanoscale magnetic particles suspended in a carrier fluid. Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. The magnetic attraction of nanoparticles is weak enough that the surfactant’s Van der Waals repulsion is sufficient to prevent magnetic clumping or agglomeration.” Magnetoscope, Michael Flynn.
via freshphotons
(via proofmathisbeautiful)
