Figure 8

Phase-contrast optical microscopy images (×10, ×20, and × 40) of a dispersion of nanostructured wires. The wires are made from 8.3 nm γ-Fe₂O₃ particles and PDADMAC at Z = 0.3 (a), Z = 1 (b), and Z = 7 (c). At Z = 0.3, we could get the wires with maximum length of 500 μm (0.5 mm) directly by the particles of 8.3 nm (d). Length distribution of wires was shown in insert. The continuous line was derived from best fit calculation using a log-normal distribution.