Simulated NPs. HSNP: hydroxylated silica nanoparticle; FSNP25: nanoparticle covered by 25% –CF₃ groups; FSNP55: nanoparticle covered by 55% –CF₃ groups; FSNP75: nanoparticle covered by 75% –CF₃ groups; FFSNP25: nanoparticle covered by 25% –CF₂CF₃ groups; FFSNP55: nanoparticle covered by 55% –CF₂CF₃ groups; FFSNP75: nanoparticle covered by 75% –CF₂CF₃ groups. Atom colors: Silicon, yellow; Oxygen, red; Hydrogen, white; Carbon, gray; Fluorine, cyan.