Nature provides numerous examples of organisms that synthesize intricate mineral structures (biominerals) with micro- to nanoscale features through the use of specific biomolecules.[ 1] While such control over mineral formation under ambient conditions exceeds current man-made assembly technologies, the known biominerals (only about 60 different minerals have been identified to date) do not possess compositions that are particularly attractive for many man-made devices.[ 2] Nonetheless, nature's exquisite control over biomineral ...