Directed nucleation of calcite at a crystal-imprinted polymer surface

Article Abstract:

Natural biominerals and composites have finely tuned properties reflecting the level of control over size, shape and organization of constituent crystals. It is reported that synthetic polymers could be imprinted with crystal surface motifs. Polymers were imprinted with calcite and could induce nucleation of calcite. The synthesis involved adsorption of functional monomers to a calcite surface, and co-polymerization with a cross-linker. A polymer matrix having surface functionality was yielded, mirroring the crystal face.

Nucleation, Nucleation (Chemistry)

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Formation of chiral morphologies through selective binding of amino acids to calcite surface steps

Article Abstract:

The addition of organic growth modifiers has been found to change the energy landscape seen by adsorbing and desorbing calcite species at the surface level of the mineral, thereby altering the rates of attachment and detachment. It is suggested that the process underlying crystal modification through organic molecules should be understood by taking account of both stereochemical recognition and the impact of binding on the interfacial energies of the developing crystal.

Growth, Crystals, Crystal growth

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Spontaneous movement of ions through calcite at standard temperature and pressure

Article Abstract:

Superficially, the mineral calcite found in marble, limestone and chalk appears to be relatively stable, but a closer look at its chemical and isotopic composition provides evidence that calcium, cadmium and zinc ions gradually move through bulk calcite. A new study reveals that potassium, sodium and calcium ions also migrate through the material, casting doubt on the accuracy of many geochronology and paleoclimate studies.

Observations, Geological research

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