Direct Imaging of Dynamical Heterogeneities near the Colloid-Gel Transition Export

@article{citeulike:1584616, abstract = {We observe the microscopic dynamics of a suspension of colloids with attractive interaction by confocal fluorescence microscopy to provide a deeper understanding of the relationship between local structure and dynamics near the gel transition. We study the distinct and self-parts of the van Hove density-density correlation function applied to our experimental data. Separable fast and slow populations emerge in the self-part, while the distinct part shows a pronounced signature of dynamic heterogeneities close to the gel transition, dominated by the fast particles. The slow population close to the gel transition shares features with an attraction-driven colloidal glass, including a plateau in the mean squared displacement that provides an estimate for the dynamical localization length.}, author = {Gao, Y. and Kilfoil, M. L.}, citeulike-article-id = {1584616}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000099000007078301000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v99/e078301}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevLett.99.078301}, doi = {10.1103/PhysRevLett.99.078301}, journal = {Physical Review Letters}, keywords = {confocal, gel, heterogeneity, pair-correlation-function}, number = {7}, posted-at = {2007-08-23 03:16:18}, priority = {2}, publisher = {APS}, title = {Direct Imaging of Dynamical Heterogeneities near the Colloid-Gel Transition}, url = {http://dx.doi.org/10.1103/PhysRevLett.99.078301}, volume = {99}, year = {2007} }

TY - JOUR ID - citeulike:1584616 L3 - citeulike-article-id:1584616 N2 - We observe the microscopic dynamics of a suspension of colloids with attractive interaction by confocal fluorescence microscopy to provide a deeper understanding of the relationship between local structure and dynamics near the gel transition. We study the distinct and self-parts of the van Hove density-density correlation function applied to our experimental data. Separable fast and slow populations emerge in the self-part, while the distinct part shows a pronounced signature of dynamic heterogeneities close to the gel transition, dominated by the fast particles. The slow population close to the gel transition shares features with an attraction-driven colloidal glass, including a plateau in the mean squared displacement that provides an estimate for the dynamical localization length. IS - 7 JF - Physical Review Letters TI - Direct Imaging of Dynamical Heterogeneities near the Colloid-Gel Transition PB - APS VL - 99 KW - confocal KW - gel KW - heterogeneity KW - pair-correlation-function AU - Gao, Y AU - Kilfoil, ML PY - 2007/// UR - http://dx.doi.org/10.1103/PhysRevLett.99.078301 ER -