Effect of Impurity on the Lateral Crystal Growth of <scp>l</scp>-Alanine: A Combined Simulation and Experimental Study

Yang, Xiangyu; Qian, Gang; Duan, Xuezhi; Zhou, Xinggui

doi:10.1021/ie301600n

Cited by 22 publications

(32 citation statements)

References 28 publications

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“…The combination of these two mechanisms, that is, the impurity's pinning at the steps and the solute's diffusion on the crystal surface, explains the experimental observations of the inhibited growth at lower impurity concentrations and the promoted growth at higher impurity concentrations. 32 …”

Section: Resultsmentioning

confidence: 99%

Impurity Effect of l-Valine on l-Alanine Crystal Growth

Yang

Qian

Duan

2013

Crystal Growth & Design

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The effect of L-valine on the growth of the Lalanine (011) surface from solution crystallization is studied by combining single-crystal growth experiments and molecular simulation. For the first time, an unusual promotion effect of Lvaline on L-alanine crystal growth, after the initial inhibition effect, is found when the impurity concentration is higher. Through molecular simulation, it is revealed that this unusual promotion effect is due to the close interaction between Lalanine and L-valine, which repels H 2 O around solute molecules and therefore eliminates the negative effect of H 2 O on surface diffusion of L-alanine.

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Section: Resultsmentioning

confidence: 99%

Impurity Effect of l-Valine on l-Alanine Crystal Growth

Yang

Qian

Duan

2013

Crystal Growth & Design

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“…3). The growth rate of steps in the presence of impurities was previously calculated using step pinning theory (Yang et al 2012). The lateral growth of several microcrystallites at different locations gradually decreases the evaporative surface area and leads to the formation of a crust (skin) as soon as the steps of adjacent growing crystals join each other (Fig.…”

Section: Drying At Summer Weather Conditions (Rh 60%)mentioning

confidence: 99%

Drying of Salt Solutions from Porous Media: Effect of Surfactants

2018

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The evaporation of salt (NaCl) solutions from porous media is studied in the presence of surfactants, because surfactants are often used as cleaning agents for salt-contaminated stones. We show that, contrary to what is commonly assumed, the presence of the surfactant and the changed wetting properties do not affect the drying kinetics: The impact of the surfactants is rather that of a crystallization modifier for the salt. Upon adding a cationic or nonionic surfactant to salt solution, the drying rate is unchanged initially, but can slow down dramatically at later times due to the formation of a salt crust at the surface. When this happens, the total drying time increases compared to pure NaCl solutions without surfactants, at least for very porous stones for which the pores become completely blocked. Surprisingly, for a low-porosity stone the small pores at the surface remain open. The longer drying time for the large porosity stone increases the risk of, e.g., frost or fungal damage to the stones. Consequently, the use of surfactants in conservation treatments should be done with caution.

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“…A molecular simulation was also used to explain the change of morphology in the presence of additives via a build‐in approach and a surface‐docking approach . The binding energy between additives and the crystal surface was calculated as a means of predicting the morphology . Though there have been a large number of studies examining the growth inhibition effects of interactions between additives and the crystal surface, the effects of the diffusion coefficient have not been taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

“…[9,10] The binding energy between additives and the crystal surface was calculated as a means of predicting the morphology. [11][12][13] Though there have been a large number of studies examining the growth inhibition effects of interactions between additives and the crystal surface, the effects of the diffusion coefficient have not been taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

Crystallization of Ammonium Persulfate in the Presence of an Additive: Experimental and Molecular Dynamics Simulation Studies

Gao³

2018

Crystal Research and Technology

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Binding energy effects have been considered the main cause behind additives hindering crystal growth. In this study, the effects of the diffusion coefficient between the additive and the crystal surface is further investigated. The influence of the additive sodium dodecyl benzene sulfonate (SDBS) on the morphology of ammonium persulfate (APS) crystals is investigated in both experimental procedures and molecular dynamics simulation studies. It is observed that the growth of (10‐2) surface is more significantly inhibited by the addition of SDBS than is the formation of (11‐1) surface, which contributes to an elongated morphology of the APS crystal. The mechanisms of this effect are examined by performing a molecular dynamics (MD) simulation. The interaction energy and the diffusion coefficient during crystal growth are calculated.

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Effect of Impurity on the Lateral Crystal Growth of l-Alanine: A Combined Simulation and Experimental Study

Cited by 22 publications

References 28 publications

Impurity Effect of l-Valine on l-Alanine Crystal Growth

Impurity Effect of l-Valine on l-Alanine Crystal Growth

Drying of Salt Solutions from Porous Media: Effect of Surfactants

Crystallization of Ammonium Persulfate in the Presence of an Additive: Experimental and Molecular Dynamics Simulation Studies

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