Growth of filamentary KDP crystals from solution with the addition of Al(NO3)3 · 9H2O

Vorontsov, Dmitry А.; Kim, E. L.; Portnov, V. N.; Chuprunov, E. V.

doi:10.1134/1.1564217

Cited by 8 publications

(5 citation statements)

References 1 publication

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“…Macromolecule adsorption to crystal surfaces can be slow (section ), resulting in nonlinear phenomena such as growth rate hysteresis and spontaneous growth rate oscillations. Such effects on crystal growth were originally discovered for crystalline oleic acid, paraffin C 36 H 74 with dioctadecylamine, potassium and ammonium dihydrogen phosphates grown with Al 3+ , Fe 3+ , and Cr 3+ , − potassium sulfate with Cr 3+ , , ice, and paracetamol . They have been observed with MM additives to ice, ,,, lysozyme, , calcite, and COM. , …”

Section: Crystallization Kineticsmentioning

confidence: 81%

Crystal Growth with Macromolecular Additives

2017

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Interactions of macromolecules with growing crystalline surfaces play an important role in biomineralization, determine survival of some organisms at low temperatures, and offer a range of potential industrial applications. The current understanding of crystal growth processes in the presence of macromolecules, including peptides and proteins, is reviewed, with a focus on interactions between macromolecules and surfaces of crystalline materials, macromolecule adsorption on different types of crystal surfaces, crystallization kinetics in the presence of macromolecular additives, macromolecule incorporation, and defect generation. Throughout, special attention is paid to the selectivity of macromolecule adsorption on, and incorporation within, crystal surfaces. The special role played by the size and complexity of macromolecules as compared to other crystallization additives is emphasized.

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Section: Crystallization Kineticsmentioning

confidence: 81%

Crystal Growth with Macromolecular Additives

2017

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“…In addition to the promotion so far discussed, AFP-III also suppresses the growth of ice at low supercoolings. The suppression of ice growth by AFP-III can be understood on the basis of the classical pinning model by Cabrera-Vermilyea previously applied to the explanation of the effect of angstrom size ionic impurities on inorganic crystal growth. − According to this model, AFP-III molecules adsorbed on ice surfaces can be considered as obstacles for the growing surface. The parts of the crystal surface penetrating through the adsorbed AFP-III molecules become more curved.…”

Section: Discussionmentioning

confidence: 99%

Growth of Ice Crystals in the Presence of Type III Antifreeze Protein

Vorontsov

Sazaki

Titaeva

et al. 2018

Crystal Growth & Design

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The morphology and growth kinetics of ice single crystals in aqueous solutions of type III antifreeze protein (AFP-III) have been studied in detail over a range of AFP-III concentrations and supercoolings. In pure water, the shape of ice crystals changes from the circular disklike to planar dendritic with increasing supercooling. In AFP-III solutions, ice crystals in the form of faceted plates, irregular dendrites with polygonized tips, and needles appear with increasing supercooling and AFP-III concentration. The growth rate of ice crystals in the crystallographic a direction is 2 orders of magnitude higher than that in the c direction. AFP-III molecules cause the stoppage of the growth of the prismatic and basal faces at low supercoolings. When supercooling exceeds the critical value, AFP-III favors the acceleration of the growth in both a and c directions. The observed behavior of AFP-III is explained in terms of the Cabrera-Vermilyea pinning model and the specificity of the dissipation of latent heat from the growing crystals with different shapes.

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“…Several studies describing the hysteresis phenomenon can be found in the literature. − The model of Kubota offers only a qualitative level hysteresis of growth rates. Ferreira et al, studying the growth of lysozyme crystals, developed a model which takes into account the density of kinks on growth steps.…”

Section: Model Of the Dead Zone And Hysteresis Of Growth Ratesmentioning

confidence: 99%

Antifreeze Effect of Carboxylated ε-Poly-l-lysine on the Growth Kinetics of Ice Crystals

et al. 2014

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Some biological substances control the nucleation and growth of inorganic crystals. Antifreeze proteins, which prohibit ice crystal growth in living organisms, promise are also important as biological antifreezes for medical applications and in the frozen food industries. In this work, we investigated the crystallization of ice in the presence of a new cryoprotector, carboxylated ε-poly-L-lysine (COOH-PLL). In order to reveal the characteristics and the mechanism of its antifreeze effect, free-growth experiments of ice crystals were carried out in solutions with various COOH-PLL concentrations and degrees of supercooling, and the depression of the freezing point and growth rates of the tips of ice dendrites were obtained using optical microscopy. Hysteresis of growth rates and depression of the freezing point was revealed in the presence of COOH-PLL. The growth-inhibition effect of COOH-PLL molecules could be explained on the basis of the Gibbs-Thomson law and the use of Langmuir's adsorption isotherm. Theoretical kinetic curves for hysteresis calculated on the basis of Punin-Artamonova's model were in good agreement with experimental data. We conclude that adsorption of large biological molecules in the case of ice crystallization has a non-steady-state character and occurs more slowly than the process of embedding of crystal growth units.

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Growth of filamentary KDP crystals from solution with the addition of Al(NO3)3 · 9H2O

Cited by 8 publications

References 1 publication

Crystal Growth with Macromolecular Additives

Crystal Growth with Macromolecular Additives

Growth of Ice Crystals in the Presence of Type III Antifreeze Protein

Antifreeze Effect of Carboxylated ε-Poly-l-lysine on the Growth Kinetics of Ice Crystals

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