Microscopic Observation of Crystallites in the Deionized Suspensions of Monodispersed Polystyrene Spheres

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Abstract
Photographs are taken for the crystallites and grain boundaries in the ordered colloidal crystals of monodispersed polystyrene spheres by four methods, (1) using a metallurgical microscope with a standard illumination device, (2) a metallurgical microscope with diagonal illumination, (3) a polarized metallurgical microscope, and (4) close‐up photographing. The size of the crystallites is 100–200 urn and increases as the concentration of spheres decreases, which is consistent with the results from the reflection spectrum measurements.