Fig. 3
From: Total morphosynthesis of biomimetic prismatic-type CaCO3 thin films

Characterization of the prismatic-type vateritic CaCO3-SF thin films. a POM image showing the uniform prismatic thin films over an area of hundreds of square micrometers in domain size. b Cross-section SEM image showing the structural information of the prismatic overlayer, where the boundary between the transition layer and the overlayer is highlighted by a white arrow. c Cross-section SEM image showing the granular nature of the overlayer. d, e TEM d and SAED e images of the prismatic overlayer. Indices in the SAED image e were based on the P3221 structure28. The overgrowth occurred in the presence of 6 g L−1 SF