L. Chitu, S. Luby, E. Majkova, P. Hrkut, L. Matay, I. Kostic, A. Satka
Regular 2D-arrays from magnetic nanoparticle (NP) colloidal solutions were formed on the surface of a microelectromagnetic matrix chip with local configurations of magnetic field created by current-carrying conductors 2-20 µm wide. At the surface of the matrix, planarized by polyimide, there are local fields ≤200 Oe. The manipulation of Co, Fe 3 O 4 and CoFe 2 O 4 NPs was studied. NP arrays are formed in the center of circular traps with local field maxima, NPs assemble at the edge of conductors or they form …
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