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Snapshots of aqueous suspensions of citrated (a) and PEGylated (b) IONPs at particle volume fraction ϕ0 = 0.17 ± 0.03 vol.% subjected to an external uniform magnetic field of intensity H0 = 13.5 kA/m. Each row corresponds to the elapsed time from the moment of the magnetic field application t = 0 (upper row), 5, 10, 15 and 20 min (bottom row).
