6533b862fe1ef96bd12c773d

RESEARCH PRODUCT

Single-File Diffusion of Colloids in One-Dimensional Channels

Markus KollmannClemens BechingerChristoph LutzChristoph Lutz

subject

PhysicsMean squared displacementColloidSelf-diffusionScale (ratio)Optical tweezersGeneral Physics and Astronomyddc:530Diffusion (business)Structure factorDisplacement (fluid)Molecular physics

description

We study the diffusive behavior of colloidal particles which are confined to one-dimensional channels generated by scanning optical tweezers. At long times t, the mean-square displacement is found to scale as t(1/2), which is expected for systems where single-file diffusion occurs. In addition, we experimentally obtain the long-time, self-diffusive behavior from the short-time collective density fluctuations of the system as suggested by a recent analytical approach [Phys. Rev. Lett. 90, 180602 (2003)]. published

yearjournalcountryeditionlanguage
2004-07-08
10.1103/physrevlett.93.026001