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- Autorius: Stephan E Wolf
- Leidėjas: Sudwestdeutscher Verlag Fur Hochschulschriften AG
- Metai: 2011
- Puslapiai: 120
- ISBN-10: 3838125398
- ISBN-13: 9783838125398
- Formatas: 15.2 x 22.9 x 0.7 cm, minkšti viršeliai
- Kalba: Anglų
Nonclassical Crystallization of Bivalent Metal Carbonates (el. knyga) (skaityta knyga) | knygos.lt
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Aprašymas
Since non-classical crystallization pathways were revealed, our picture of nucleation and crystal growth became in the last year quite confusing and ramified: we are confronted with the existence of liquid phases of amorphous calcium carbonate, polymer-induced liquid precursor and, last but not least, pre-nucleation clusters. This contribution explores: (a) The symmetry-breaking phase-selection of calcium carbonate, which is based upon a subtle interplay of interlinked equilibria and is ultimately ascribed to the weak parity violation energy difference. (b) A morphogenetic employment of mesocrystallinity: the inter-crystalline minority constituent of a mesocrystal, e.g. occluded protein or polymeric additives, experiences compression-molding which can be employed for the preparation of nanotubes of various materials, e.g. calcium carbonate or cadmium sulfide. (c) The existence of a liquid intermediate phase during metal carbonate formation. By a diffusion-controlled and contract-free experimental setup, unequivocally evidence for the existence of nonclassical liquid intermediates, which precede the crystalline phase of bivalent carbonates at near-neutral conditions, is provided.
- Autorius: Stephan E Wolf
- Leidėjas: Sudwestdeutscher Verlag Fur Hochschulschriften AG
- Metai: 2011
- Puslapiai: 120
- ISBN-10: 3838125398
- ISBN-13: 9783838125398
- Formatas: 15.2 x 22.9 x 0.7 cm, minkšti viršeliai
- Kalba: Anglų
Since non-classical crystallization pathways were revealed, our picture of nucleation and crystal growth became in the last year quite confusing and ramified: we are confronted with the existence of liquid phases of amorphous calcium carbonate, polymer-induced liquid precursor and, last but not least, pre-nucleation clusters. This contribution explores: (a) The symmetry-breaking phase-selection of calcium carbonate, which is based upon a subtle interplay of interlinked equilibria and is ultimately ascribed to the weak parity violation energy difference. (b) A morphogenetic employment of mesocrystallinity: the inter-crystalline minority constituent of a mesocrystal, e.g. occluded protein or polymeric additives, experiences compression-molding which can be employed for the preparation of nanotubes of various materials, e.g. calcium carbonate or cadmium sulfide. (c) The existence of a liquid intermediate phase during metal carbonate formation. By a diffusion-controlled and contract-free experimental setup, unequivocally evidence for the existence of nonclassical liquid intermediates, which precede the crystalline phase of bivalent carbonates at near-neutral conditions, is provided.
Atsiliepimai