Crystals, asymmetry and life
Article Abstract:
Research into how molecules of aspartic acid bind to growing calcite crystals indicates that the reduction of calcite symmetry arises at a crystal interface during growth. When calcite is grow in the presence of the D or L form of aspartic acid, the morphology of crystal steps and terraces develops asymmetry.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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Calcitic microlenses as part of the photoreceptor system in brittlestars
Article Abstract:
It has been established that some single calcite crystals used by brittlestars for skeletal construction are also an element of specialized photosensory organs, possibly with the function of a compound eye. The microlenses were seen to be optical elements that guide and focus the light inside the tissue.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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Micro-printing with crystal inks
Article Abstract:
It has been possible to produce a surface with a series of raised topographic features, ranging in size from 3 micro-m to 50 micro-m, separated from each other by up to 100 micro-m. Inked stamps, made from self-assembling molecules with various charged or polar functional groups, were transferred to surfaces of silicon coated with metal. The intervening areas were filled up with methyl-terminated molecules. Calcite crystals nucleated only on the functionalized areas after the patterned surface was suspended in a solution saturated with calcium carbonate.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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