@article {155491, title = {Short-time self-diffusion of nearly hard spheres at an oil-water interface}, journal = {Journal of Fluid Mechanics}, volume = {618}, year = {2009}, pages = {243-261}, abstract = {Optical microscopy and multi-particle tracking are used to study hydrodynamic interactions of monodisperse polymethylmethacrylate (PMMA) spheres at a decalin-water interface. The short-time self-diffusion coefficient measured at low surface coverage has the form D(S)(S)(n) = alpha D(0)(1 - beta n), where n is the area fraction Occupied by the particles, and Do is the Stokes-Einstein diffusion coefficient in the bulk suspension of PMMA spheres in decalin. The measured values of a are found to be in good agreement with the numerical calculation for the drag coefficient of interfacial particles. The measured values of P differ from that obtained for bulk suspensions, indicating that hydrodynamic interactions between the particles have interesting new features at the interface.}, url = {https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/abs/shorttime-selfdiffusion-of-nearly-hard-spheres-at-an-oilwater-interface/6EBB58ABBF8BBB14A78F896C1DA8664D}, author = {Peng, Y. and Chen, W. and Fischer, Th M. and Weitz, D. A. and Tong, P.} }