Figure 17.
(a) Image of the electrostatic spray system step. Reproduced from [159]. (b) SEM image of the electrostatic spray deposited nanowire network. Reproduced from [159]. (c) Schematic of the spray coating apparatus. Reproduced from [158]. (d) representative dark-field optical image of spray-coated SiNWs on the SiOx/Si substrate and the constituent analysis of 700 SiNWs with respect to the flow direction. Reproduced from [158]. Spray coating method can be controlled under conditions of temperature, droplet size, spray coating angle, and airflow which makes this method interesting either in the well-aligned or well controlled density in large size of nanonet with a small lack in control over the low density of nanonets.