Figure 9

3D microscopy images and the corresponding schematic illustrations of the microscopic structure of the bubble surfaces of (a,d) SDBS foam: 0.1 wt% SDBS + N₂ ; (b,e) SiO₂/SDBS foam: 0.25 wt% SiO₂ nanoparticle + 0.1 wt% SDBS + N₂ ; (c,f) SiO₂/SDBS foam: 1.00 wt% SiO₂ nanoparticle + 0.1 wt% SDBS + N₂.