Morphology of Crystals Made of Hard Spheres

He, Yueming; Olivier, Bernard J.; Ackerson, Bruce J.

doi:10.1021/la9609433

Cited by 26 publications

(22 citation statements)

References 30 publications

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“…[38][39][40] These two growth regimes are clearly visible at low temperatures (T 0.034) in both experiments and simulations. The power law associated with the first growth regime is significantly larger than that of the second growth regime.…”

Section: Order Parameter and Domain Sizementioning

confidence: 74%

Crystallization kinetics of binary colloidal monolayers

et al. 2016

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Experiments and simulations are used to study the kinetics of crystal growth in a mixture of magnetic and nonmagnetic particles suspended in ferrofluid. The growth process is quantified using both a bond order parameter and a mean domain size parameter. The largest single crystals obtained in experiments consist of approximately 1000 particles and form if the area fraction is held between 65-70 % and the field strength is kept in the range of 8.5-10.5 Oe. Simulations indicate that much larger single crystals containing as many as 5000 particles can be obtained under impurity-free conditions within a few hours. If our simulations are modified to include impurity concentrations as small as 1-2 %, then the results agree quantitatively with the experiments. These findings provide an important step toward developing strategies for growing single crystals that are large enough to enable followon investigations across many subdisciplines in condensed matter physics.

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Section: Order Parameter and Domain Sizementioning

confidence: 74%

Crystallization kinetics of binary colloidal monolayers

et al. 2016

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“…We note that similar effects have been seen during the growth of colloidal crystals. 23 The theory presented in this article does not account for these events.…”

Section: Resultsmentioning

confidence: 91%

Maximizing the grain growth rate during the disorder‐to‐order transition in block copolymer melts

Kim¹,

Garetz

Newstein³

et al. 2001

J Polym Sci B Polym Phys

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ABSTRACT:The factors controlling grain growth during the disorder-to-order transition in a polystyrene-block-polyisoprene copolymer melt were studied with time-resolved depolarized light scattering. The ordered phase consisted of hexagonally packed polyisoprene cylinders, and the order-disorder-transition temperature of the block copolymer (T ODT ) was 132 Ϯ 1°C. Our objective was to identify the temperature at which the grain growth rate was maximized (T max ) and compare it with theoretical predictions. We conducted seeded grain growth experiments, which comprised two steps. In the first step, which lasted for 43 min, the sample was cooled from the disordered state to 124°C. This resulted in the formation of a small number of ordered grains or seeds. This was followed by a second step in which the sample was heated to temperatures between 124 and 132°C and the seeds grew with time. Our objective was to study grain growth at different temperatures starting from the same initial condition. The value of T max obtained experimentally was 128°C. The theoretically predicted value of T max , based entirely on the rheological properties of the disordered sample and T ODT , was also 128°C.

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“…Further, a preferred orientation of homogeneous nuclei was observed in simulations [390]. Even small shear rates suffice to suppress dendrite growth [379]. Shear may further induce and orient heterogeneous nuclei yielding anisotropic micro-structures [155,308,309,388,391,392,393].…”

Section: External Fieldsmentioning

confidence: 99%

Crystallization kinetics of colloidal model suspensions: recent achievements and new perspectives

Palberg

2014

J. Phys.: Condens. Matter

125

132

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Colloidal model systems allow studying crystallization kinetics under fairly ideal conditions, with rather well-characterized pair interactions and minimized external influences. In complementary approaches experiment, analytic theory and simulation have been employed to study colloidal solidification in great detail. These studies were based on advanced optical methods, careful system characterization and sophisticated numerical methods. Over the last decade, both the effects of the type, strength and range of the pair-interaction between the colloidal particles and those of the colloid-specific polydispersity have been addressed in a quantitative way. Key parameters of crystallization have been derived and compared to those of metal systems. These systematic investigations significantly contributed to an enhanced understanding of the crystallization processes in general. Further, new fundamental questions have arisen and (partially) been solved over the last decade: including, for example, a two-step nucleation mechanism in homogeneous nucleation, choice of the crystallization pathway, or the subtle interplay of boundary conditions in heterogeneous nucleation. On the other hand, via the application of both gradients and external fields the competition between different nucleation and growth modes can be controlled and the resulting microstructure be influenced. The present review attempts to cover the interesting developments that have occurred since the turn of the millennium and to identify important novel trends, with particular focus on experimental aspects.

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Morphology of Crystals Made of Hard Spheres

Cited by 26 publications

References 30 publications

Crystallization kinetics of binary colloidal monolayers

Crystallization kinetics of binary colloidal monolayers

Maximizing the grain growth rate during the disorder‐to‐order transition in block copolymer melts

Crystallization kinetics of colloidal model suspensions: recent achievements and new perspectives

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