Nanoferrofluid Materials: Advanced Structure Monitoring Using Optical Transmission in a Magnetic Field

Figure 6

Schematic of the formation and growth of columnar aggregates (from large nanoparticles) in an external magnetic field strength (). (a) Long chains of magnetic nanoparticles in an external magnetic field. (b) Lateral aggregation of long chains and formation of thicker columnar aggregates with increasing of external magnetic field and/or over time. (c) Further lateral aggregation of columnar aggregates.

(a)

(b)

(c)