Original Entry by Michelle Borkin, AP225 Fall 2009
Scanning electron micrographs of natural crystaline structures. All examples here are biogenic calcium carbonate structures: a) Dorsal arm plate of the brittle star Ophiocoma wendti
. b) Fragment of a mollusk shell structure. c) Wall structure of calcareous sponge Sycon
sp. d) Fragment of a coccolith skeleton.
"Crystallization in Patterns: A Bio-Inspired Approach."
J. Aizenberg, Adv. Mater., 2004, 16, 1295-1302.
Biomineralization, Artificial Crystallization, Self-assembled monolayers (SAMs), Nucleation
Schematic illustration of the experimental steps for the fabrication of micropatterned substrates used in the crystal growth experiments: a) microcontact printing, b) topographically assisted self-assembly, and c) mechanism of localized crystal growth.
Examples of micropatterned oriented calcium carbonate films formed on SAM templates. The substrates in (a-e) and (g) were fabricated using microcontact printing (see Figure 2(a)), while the substrates in (f) and (h) were fabricated using topographically assisted assembly (see Figure 2(b)). (See Figure 3 in the paper for a more detailed explanation of each film.)
Figures 5 & 6:
New experimental approach schematic and sample micropattern (see caption in original figure for more details).