Seminar | April 19 | 4-5 p.m. | 348 Hearst Memorial Mining Building
Professor Pupa Gilbert, University of Wisconsin-Madison
Crystallization done by living organisms, termed biomineralization, involves biological control over crystal nucleation, growth, and crystal orientation patterns in the final biomineral. In this MSE seminar I will describe one mechanism of crystallization by attachment of amorphous particles  to fresh, forming coral skeletons, and their subsequent crystallization into aragonite crystals . Unprecedented crystal orientation patterns as the one displayed here, analyzed and displayed using Polarization-dependent Imaging Contrast (PIC) mapping , reveal that the crystals are spherulitic , that is, elongated, and radiating from centers or lines. Spherulites fill 3D space  at greater speed than any other crystal growth mode , thus this is Natures 3D printing.
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