Layering of Magnetic Nanoparticles at Amorphous Magnetic Templates with Perpendicular Anisotropy
Apurve Saini, Julie Borchers, Sebastian George, Brian B. Maranville, Kathryn L. Krycka, Joseph Dura, Katharina Theis-Brohl, Max Wolff
We reveal the assembly of monodisperse magnetite nanoparticles of sizes 5 nm, 15 nm and 25 nm from dilute water-based ferrofluids onto an amorphous magnetic template with out-ofplane anisotropy. From neutron reflectometry experiments we extract density profiles and show that the particles self-assemble into layers at the magnetic surface. The layers are extremely stable against cleaning and rinsing of the substrate. The density of the layers is determined by and increases with the remanent magnetic moment of the particles.
Welf-assembly, Magnetic nanoparticles, Ferrofluid, Neutron reflectivity, Magnetic interactions
, Borchers, J.
, George, S.
, Maranville, B.
, Krycka, K.
, Dura, J.
, Theis-Brohl, K.
and Wolff, M.
Layering of Magnetic Nanoparticles at Amorphous Magnetic Templates with Perpendicular Anisotropy, Soft Matter
(Accessed August 9, 2022)