Abstract
Thin film of silica nanoparticles with highly ordered hemisphere macro pores was obtained by a spin coater and a capillary coater. The ordering factor of hemisphere macropores on silica thin films was 98% using spin coater by Voronoi polygon analysis. The pore size can be controlled by selecting the size of polystyrene Latex (PSL) spheres in the range of 50-1700nm. Furthermore we discuss the key to obtain highly ordered PSL spheres with less their boundaries. The employment of silica nanoparticles as a second particle enhances the mobility of PSL spheres. Its elastic repulsion and Brownian motion make it easy to reach the equilibrium structures that are highly ordered hexagonal packing during drying. After the mixture of PSL and silica nanoparticles was coated on a glass plate, the PSL were completely decomposed at a temperature of approximately 400°C for 10-15 minutes. The thin film can be used as a substrate for patterning by its shape, or an anti-reflection film by its optical property.
