Table 1: Dimensional parameters of all the particles used for adhesion measurements. The values are averaged for 10 particles per particle type.

Microsphere
supplier
Chemical compositionActual diameterActual surface roughness ( 1 × 1 𝜇 m2 area) RMS (nm)

Bangs LaboratoriesSilica 4 . 5 3 ± 0 . 0 7 𝜇 m 3 . 5 ± 1 . 3
Microspheres-nanospheres Company Silica 3 0 . 1 8 ± 0 . 1 6 𝜇 m 1 4 . 3 ± 7 . 2