Interactive effect of agitation rate and oxidative etching on growth mechanisms of silver nanowires during polyol process

Figures & data

Figure 1. SEM images of synthesised silver nanostructures obtained (A) without stirring, (B) stirring at 260 rpm and (C) stirring at 2000 rpm. Bottom-right schematic of each image represents major nanostructures.

Figure 2. UV–Vis spectrum of silver nanostructures obtained (A) without stirring, (B) stirring at 260 rpm and (C) stirring at 2000 rpm.

Figure 3. XRD pattern of silver nanostructures in different cases: (A) without stirring, (B) stirring at 260 rpm and (C) stirring at 2000 rpm.

Figure 4. SEM photograph of an MDNW.

Figure 5. Presenting the morphology evolution of a decahedron (a) to a truncated decahedron (b) and the further growth under two external stress conditions.

Figure 6. Phase diagram for small particles. Modified with permission from [35].

Figure 7. (Colour online) Proposed mechanism for uniaxial growth of silver nanowires. Atoms addition along red arrows could not overcome the strain energy barrier and thus dissolve into the solution again.

Figure 8. Plot of aspect ratio of silver nanostructures versus CuCl₂ concentration in a constant stirring rate of 260 rpm.

Figure 9. SEM results for samples with different concentrations of CuCl₂ solution: (a) 0.1mM, (b) 1mM and (c) 2mM.

Ajayan PM, Marks LD. Quasimelting and phases of small particles. Phys Rev Lett. 1988;60:585–587.

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