Figure 4From: New Colloidal Lithographic Nanopatterns Fabricated by Combining Pre-Heating and Reactive Ion EtchingSEM images of monolayer of PS spheres (1,000 nm in diameter):a1,b1 before and after preheating;a2,b2 after the same oxygen RIE conditions for the nonpreheated sample and preheated sample, respectively. Thescale bar is 1,000 nm in each imageBack to article page