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dc.contributor.authorTegze, G-
dc.contributor.authorGranasy, L-
dc.contributor.authorToth, GI-
dc.contributor.authorDougls, JF-
dc.contributor.authorPusztai, T-
dc.identifier.citationSoft Matter 7: 1789-1799, Dec 2010en_US
dc.descriptionThe official published version of the Article can be accessed from the link below - Copyright @ 2010 Royal Society of Chemistryen_US
dc.description.abstractThe present work explores the ubiquitous morphological changes in crystallizing systems with increasing thermodynamic driving force based on a novel dynamic density functional theory. A colloidal ‘soft’ material is chosen as a model system for our investigation since there are careful colloidal crystallization observations at a particle scale resolution for comparison, which allows for a direct verification of our simulation predictions. We particularly focus on a theoretically unanticipated, and generic, morphological transition leading to progressively irregular-shaped single crystals in both colloidal and polymeric materials with an increasing thermodynamic driving force. Our simulation method significantly extends previous ‘phase field’ simulations by incorporating a minimal description of the ‘atomic’ structure of the material, while allowing simultaneously for a description of large scale crystal growth. We discover a ‘fast’ mode of crystal growth at high driving force, suggested before in experimental colloidal crystallization studies, and find that the coupling of this crystal mode to the well-understood ‘diffusive’ or ‘slow’ crystal growth mode (giving rise to symmetric crystal growth mode and dendritic crystallization as in snowflakes by the Mullins–Sekerka instability) can greatly affect the crystal morphology at high thermodynamic driving force. In particular, an understanding of this interplay between these fast and slow crystal growth modes allows us to describe basic crystallization morphologies seen in both colloidal suspensions with increasing particle concentration and crystallizing polymer films with decreasing temperature: compact symmetric crystals, dendritic crystals, fractal-like structures, and then a return to compact symmetric single crystal growth again.en_US
dc.description.sponsorshipThis work has been supported by the EU FP7 Collaborative Project ENSEMBLE under Grant Agreement NMP4-SL-2008-213669 and by the Hungarian Academy of Sciences under contract OTKA-K-62588.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.ispartofBrunel Centre for Advanced Solidification Technology-
dc.titleTuning the structure of non-equilibrium soft materials by varying the thermodynamic driving force for crystal orderingen_US
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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