Hard sphere crystal nucleation and growth near large spherical impurities
We report how large spherical impurities affect the nucleation and growth of hard sphere colloidal crystals. Both the impurities and the colloids are fluorescently labelled polymethylmetacrylate particles and are dispersed in an optically and density matching solvent mixture. Crystal growth, initiat...
| Main Authors: | , , , , , |
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| Formato: | Conference item |
| Publicado em: |
2005
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| _version_ | 1826299565536444416 |
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| author | de Villeneuve, V Verboekend, D Dullens, R Aarts, D Kegel, W Lekkerkerker, H |
| author_facet | de Villeneuve, V Verboekend, D Dullens, R Aarts, D Kegel, W Lekkerkerker, H |
| author_sort | de Villeneuve, V |
| collection | OXFORD |
| description | We report how large spherical impurities affect the nucleation and growth of hard sphere colloidal crystals. Both the impurities and the colloids are fluorescently labelled polymethylmetacrylate particles and are dispersed in an optically and density matching solvent mixture. Crystal growth, initiated either at the impurity surface, or at the sample bottom, was studied by imaging sequences of two-dimensional xy-slices in the plane of the impurity's centre of mass with a laser scanning confocal microscope. At least two factors determine whether a large impurity can function as a seed for heterogeneous nucleation: timescales and impurity curvature. The curvature needs to be sufficiently low for crystal nuclei to form on the impurity surface. If bulk crystal growth has already approached the impurity, bulk growth is dominant over growth of crystallites on the impurity surface. Such surface crystallites eventually reorient to adapt to the overall bulk crystal symmetry. © 2005 IOP Publishing Ltd. |
| first_indexed | 2024-03-07T05:03:51Z |
| format | Conference item |
| id | oxford-uuid:d93f59d3-daa4-444c-9aae-69456cb8c456 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T05:03:51Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:d93f59d3-daa4-444c-9aae-69456cb8c4562022-03-27T08:54:30ZHard sphere crystal nucleation and growth near large spherical impuritiesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:d93f59d3-daa4-444c-9aae-69456cb8c456Symplectic Elements at Oxford2005de Villeneuve, VVerboekend, DDullens, RAarts, DKegel, WLekkerkerker, HWe report how large spherical impurities affect the nucleation and growth of hard sphere colloidal crystals. Both the impurities and the colloids are fluorescently labelled polymethylmetacrylate particles and are dispersed in an optically and density matching solvent mixture. Crystal growth, initiated either at the impurity surface, or at the sample bottom, was studied by imaging sequences of two-dimensional xy-slices in the plane of the impurity's centre of mass with a laser scanning confocal microscope. At least two factors determine whether a large impurity can function as a seed for heterogeneous nucleation: timescales and impurity curvature. The curvature needs to be sufficiently low for crystal nuclei to form on the impurity surface. If bulk crystal growth has already approached the impurity, bulk growth is dominant over growth of crystallites on the impurity surface. Such surface crystallites eventually reorient to adapt to the overall bulk crystal symmetry. © 2005 IOP Publishing Ltd. |
| spellingShingle | de Villeneuve, V Verboekend, D Dullens, R Aarts, D Kegel, W Lekkerkerker, H Hard sphere crystal nucleation and growth near large spherical impurities |
| title | Hard sphere crystal nucleation and growth near large spherical impurities |
| title_full | Hard sphere crystal nucleation and growth near large spherical impurities |
| title_fullStr | Hard sphere crystal nucleation and growth near large spherical impurities |
| title_full_unstemmed | Hard sphere crystal nucleation and growth near large spherical impurities |
| title_short | Hard sphere crystal nucleation and growth near large spherical impurities |
| title_sort | hard sphere crystal nucleation and growth near large spherical impurities |
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