Figure 1.

Sketch of the limit distance. A comparison of the forces acting on aggregates depicted by a two-dimensional figure. Inside the circle with diameter equal to the limit distance, the magnetic forces outweigh the gravitational force and aggregation occurs. Outside this, the aggregates settle.

Rosick√° and ҆embera Nanoscale Research Letters 2013 8:20   doi:10.1186/1556-276X-8-20
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