Synthesis and Characterization of SiO₂ Nanoparticles and Their Efficacy in Chemical Mechanical Polishing Steel Substrate

Figure 6

Surface profiles of steel substrates polished in different slurries.

(a) Before polishing

(b) 684 nm

(c) 420 nm

(d) 362 nm

(e) 215 nm

(f) 140 nm

(g) 58 nm