Tunable Multilayers of Self-Organized Silica Nanospheres by Spin Coating

Figure 4

Formation of silica NS layers by spin coating. (a, c, e) SEM scan of silica NS spin-coated on fused silica for 4.2 rad⋅s⁻², 2.1 rad⋅s⁻², and 1 rad⋅s⁻² and volume fraction of 4.1%, 6.1%, and 7.9%. The scale bars stand for 1 μm. (b, d, f) Corresponding schematics of the process of spreading during spinning.