Fig. 12.

AFM maps and schematics of the molecular orientation demonstrate the differences of growth on polar and non-polar substrates for octacosan-1-ol molecules. AFM figures (a, c) show growing crystals, whereas the SEM figures (b, d) show the final crystal morphology. On both substrates flat crystals with different orientations were grown. Crystals grown parallel to the substrate surface, as shown in (a, b), are called plates; crystals grown perpendicular to the substrate surface are called platelets (c, d). The principle of anisotropic crystal growth is shown schematically for both preferred growth directions and described in the text