Noniridescent colloidal nanostructures
Noniridescent properties of dried patterns of the model liquids. Photographs of deposited patterns with three different size of silica nanoparticles which are originally composed of (left column) silica + water + ethanol (solution A, B, and C) and (right column) silica + water + ethanol + PEO (solution D, E, and F) where the viewing angle is varied. The pictures are taken under ambient light. Scale bars are 2 mm.