A highly transparent superamphiphobic plastic sheet was developed. The plastic sheet polymethyl
methacrylate (PMMA) was spin-coated on a glass substrate. Synthesized silica nanoparticles were
sprayed on PMMA, followed by fluorosilane drop-coating. The results of contact angle measurements
show that the developed PMMA sheet has superamphiphobic properties with high advancing contact
angles for water (154), toluene (139), and silicone oil (132.9). The amphiphobicity of the plastic sheet
can be tuned by the surface coverage of the silica nanoparticles distributed on the PMMA surface. The
surface coverage of the nanoparticles on our PMMA sheet is about 20%, and it agrees with our contact
angle calculations for the sheet with and without nanoparticles.