Growth morphology with anisotropic surface kinetics

Xiao, Rong‐Fu; Alexander, J. Iwan D.; Rosenberger, Franz

doi:10.1016/0022-0248(90)90231-9

Cited by 74 publications

(29 citation statements)

References 61 publications

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“…With increasing total pressure, CBr4 molecules undergo more collisions with vapor particles (mainly inert gas), and diffusion-limited conditions become more pronounced, and hence, the crystal becomes more unstable. Such changes of crystal morphology with increasing total pressure are in good agreement with our earlier results of computer simulation [11]. By employing a modified difFusion-limited Monte…”

Section: Rong-fu Xiaosupporting

confidence: 91%

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Morphological instabilities ofCBr4crystals during growth from vapors

Xiao

1993

Phys. Rev. E

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We have studied the surface morphological instabilities of CBr4 crystals during growth from vapors.We have found that the crystal-growth morphologies depend not only on temperature and supersaturation, but also sensitively on the total pressure of inert gas in the vapor. With increasing inert gas pressure, at otherwise the same growth conditions, crystals with initially smooth surfaces first develop cellular patterns and then evolve into dendritic structures. Although these cellulars and dendrites bear morphological similarity with those found in melt and solution-growth experiments {i. e. , the product 8' R =const, with 8' being either the width of a cellular or the radius of a dendritic tip, and R the growth rate at the corresponding solid front) the destabilizing mechanism appears to be more complex than that from bulk nutrient diffusion. We have found that the surface diffusion on the substrate also plays an important role in surface morphological instabilities in vapor crystal growth. Fig. 1 show crystal morphological evolution with increasing total pressure. Since the vapor pressure of CBr4 at the current experiment temperature range is (only a few torrs [14]) much less than that of the inert gas pressure, the total pressure is actually the pressure of the inert gas. At a total pressure of P=12 torr, a smooth and round crystal surface is observed [ Fig. 1(a)]. (Note that the white Qat area at the center of the crystal is not a facet, it results from setting the microscope out of focus. )However, as the total pressure increases to P=80 torr

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Section: Rong-fu Xiaosupporting

confidence: 91%

“…Hence the diffusion-limited condition is less satisfied and anisotropic surface kinetics is more important in the vapor growth. This was clearly demonstrated by our recent results from computer simulations [10,11].…”

Section: Rong-fu Xiaosupporting

confidence: 61%

Morphological instabilities ofCBr4crystals during growth from vapors

Xiao

1993

Phys. Rev. E

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“…At higher supersaturation branching is more frequent and the branch thickness decreases. The high anisotropy of the surface energy leads to symmetric branching and finally to symmetric dendrites [56,57].…”

Section: Discussionmentioning

confidence: 98%

Growth of calcium carbonate in polyacrylamide hydrogel: Investigation of the influence of polymer content

Helbig

2008

Journal of Crystal Growth

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“…Although existing MC techniques appear to be 3D, they are in fact only 2D because they consider only a restricted surface region, and extend the surface into the horizon by using periodic boundary conditions. [24,27,30,31] While these models can provide insights into surface properties, such as nucleation events and surface roughening, simulations of true 3D crystal structures allows for the examination of such whole-crystal phenomena as crystal morphology and inhibitor effects on crystal growth.…”

Section: Extensions To Monte Carlo Crystal Growth Simulationsmentioning

confidence: 99%

New Simulation Model of Multicomponent Crystal Growth And Inhibition

Wathen

Kuiper

Walker

et al. 2004

Chemistry A European J

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We review a novel computational model for the study of crystal structures both on their own and in conjunction with inhibitor molecules. The model advances existing Monte Carlo (MC) simulation techniques by extending them from modeling 3D crystal surface patches to modeling entire 3D crystals, and by including the use of "complex" multicomponent molecules within the simulations. These advances makes it possible to incorporate the 3D shape and non-uniform surface properties of inhibitors into simulations, and to study what effect these inhibitor properties have on the growth of whole crystals containing up to tens of millions of molecules. The application of this extended MC model to the study of antifreeze proteins (AFPs) and their effects on ice formation is reported, including the success of the technique in achieving AFP-induced ice-growth inhibition with concurrent changes to ice morphology that mimic experimental results. Simulations of ice-growth inhibition suggest that the degree of inhibition afforded by an AFP is a function of its ice-binding position relative to the underlying anisotropic growth pattern of ice. This extended MC technique is applicable to other crystal and crystal-inhibitor systems, including more complex crystal systems such as clathrates.

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Growth morphology with anisotropic surface kinetics

Cited by 74 publications

References 61 publications

Morphological instabilities ofCBr4crystals during growth from vapors

Morphological instabilities ofCBr4crystals during growth from vapors

Growth of calcium carbonate in polyacrylamide hydrogel: Investigation of the influence of polymer content

New Simulation Model of Multicomponent Crystal Growth And Inhibition

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