Dynamics of Concentrated Hard-Sphere Colloids Near a Wall Export

@article{michailidou09, abstract = {We investigate the Brownian motion of hard-sphere colloids near a solid wall by Evanescent Wave Dynamic Light Scattering (EWDLS). We carried out measurements for various volume fractions of sterically stabilized poly(methyl methacrylate) (PMMA) particles over a range of scattering wave vectors, q. While in the dilute regime, the near wall short-time diffusion is significantly slowed down due to particle-wall hydrodynamic interactions (HI); as volume fraction increases, the wall effect is progressively diminished at all q's. We present a new analysis for the EWDLS short-time self- and collective diffusivities applicable to all volume fractions and a simple model for the self-diffusion describing the interplay between particle-wall and particle-particle HI. Moreover, a weaker decay of the near-wall self-diffusion coefficient with volume fraction is predicted by Stokesian dynamics simulations.}, author = {Michailidou, V. N. and Petekidis, G. and Swan, J. W. and Brady, J. F.}, citeulike-article-id = {4073028}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000102000006068302000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v102/e068302}, journal = {Physical Review Letters}, keywords = {colloids, confinement}, number = {6}, pages = {068302}, posted-at = {2009-03-06 14:26:58}, priority = {5}, publisher = {APS}, title = {Dynamics of Concentrated Hard-Sphere Colloids Near a Wall}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000102000006068302000001&idtype=cvips&gifs=yes}, volume = {102}, year = {2009} }

TY - JOUR ID - michailidou09 L3 - citeulike-article-id:4073028 N2 - We investigate the Brownian motion of hard-sphere colloids near a solid wall by Evanescent Wave Dynamic Light Scattering (EWDLS). We carried out measurements for various volume fractions of sterically stabilized poly(methyl methacrylate) (PMMA) particles over a range of scattering wave vectors, q. While in the dilute regime, the near wall short-time diffusion is significantly slowed down due to particle-wall hydrodynamic interactions (HI); as volume fraction increases, the wall effect is progressively diminished at all q's. We present a new analysis for the EWDLS short-time self- and collective diffusivities applicable to all volume fractions and a simple model for the self-diffusion describing the interplay between particle-wall and particle-particle HI. Moreover, a weaker decay of the near-wall self-diffusion coefficient with volume fraction is predicted by Stokesian dynamics simulations. IS - 6 JF - Physical Review Letters EP - 068302 TI - Dynamics of Concentrated Hard-Sphere Colloids Near a Wall PB - APS VL - 102 SP - 068302 KW - colloids KW - confinement AU - Michailidou, VN AU - Petekidis, G AU - Swan, JW AU - Brady, JF PY - 2009/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000102000006068302000001&idtype=cvips&gifs=yes ER -