Dynamic Broadening of the Crystal-Fluid Interface of Colloidal Hard Spheres

by: Roel PA Dullens, Dirk GAL Aarts, Willem K Kegel

Physical Review Letters, Vol. 97, No. 22. (2006), pp. 228301-228301.

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摘要

We investigate the structure and dynamics of the crystal-fluid interface of colloidal hard spheres in real space by confocal microscopy. Tuning the buoyancy of the particles allows us to study the interface close to and away from equilibrium. We find that the interface broadens from 8–9 particle diameters close to equilibrium to 15 particle diameters away from equilibrium. Furthermore, the interfacial velocity, i.e., the velocity by which the interface moves upwards, increases significantly. The increasing gravitational drive leads to supersaturation of the fluid above the crystal surface. This dramatically affects crystal nucleation and growth, resulting in the observed dynamic broadening of the crystal-fluid interface.

@article{kegel06, abstract = {We investigate the structure and dynamics of the crystal-fluid interface of colloidal hard spheres in real space by confocal microscopy. Tuning the buoyancy of the particles allows us to study the interface close to and away from equilibrium. We find that the interface broadens from 8–9 particle diameters close to equilibrium to 15 particle diameters away from equilibrium. Furthermore, the interfacial velocity, i.e., the velocity by which the interface moves upwards, increases significantly. The increasing gravitational drive leads to supersaturation of the fluid above the crystal surface. This dramatically affects crystal nucleation and growth, resulting in the observed dynamic broadening of the crystal-fluid interface.}, author = {Dullens, Roel P. A. and Aarts, Dirk G. A. L. and Kegel, Willem K. }, citeulike-article-id = {3015341}, doi = {http://dx.doi.org/10.1103/PhysRevLett.97.228301}, journal = {Physical Review Letters}, keywords = {colloids, confocal, crystals, nucleation}, number = {22}, pages = {228301}, posted-at = {2008-07-17 19:54:27}, priority = {0}, publisher = {APS}, title = {Dynamic Broadening of the Crystal-Fluid Interface of Colloidal Hard Spheres}, url = {http://dx.doi.org/10.1103/PhysRevLett.97.228301}, volume = {97}, year = {2006} }

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TY - JOUR ID - kegel06 L3 - citeulike-article-id:3015341 N2 - We investigate the structure and dynamics of the crystal-fluid interface of colloidal hard spheres in real space by confocal microscopy. Tuning the buoyancy of the particles allows us to study the interface close to and away from equilibrium. We find that the interface broadens from 8–9 particle diameters close to equilibrium to 15 particle diameters away from equilibrium. Furthermore, the interfacial velocity, i.e., the velocity by which the interface moves upwards, increases significantly. The increasing gravitational drive leads to supersaturation of the fluid above the crystal surface. This dramatically affects crystal nucleation and growth, resulting in the observed dynamic broadening of the crystal-fluid interface. IS - 22 JF - Physical Review Letters EP - 228301 TI - Dynamic Broadening of the Crystal-Fluid Interface of Colloidal Hard Spheres PB - APS VL - 97 SP - 228301 KW - colloids KW - confocal KW - crystals KW - nucleation AU - Dullens, Roel AU - Aarts, Dirk AU - Kegel, Willem PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.97.228301 ER -

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