Figure 3.
SEM images of nanomaterials prepared while using 0.27 mM HAuCl4 solution as reagent A and 1.1 mM TTF solution as reagent B. The flow rate was set to 30 μL/min for HAuCl4 solution and 370 μL/min for TTF solution, while the flow rate of the buffer solution varied. As the flow rate ratio increased, the morphologies of the synthesized nanomaterials experienced changes through (a) diamond shape with apex angle of 58°, (b) long wires of several tens of micrometers, (c) wires of ∼10 μm, and (d) wires of 3–5 μm. Insets in (a) and (d) show the structures at the same scale as that in (b) and (c) to aid comparison.