Investigation of Magnetic Nanoparticle Motion under a Gradient Magnetic Field by an Electromagnet

Figure 3

Positions of 4000 MNPs in the magnetic fluid: (a) without magnetic field, (b) with magnetic field for 800 s, (c) with magnetic field for 1600 s, and (d) with magnetic field for 4000 s. Note that only the positive half part of polar coordinate of the electromagnet in Figure 1(b) is shown in this figure.

(a)

(b)

(c)

(d)