Experimental verification of near-wall hindered diffusion for the Brownian motion of nanoparticles using evanescent wave microscopy
- 28 October 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 72 (4), 042101
- https://doi.org/10.1103/physreve.72.042101
Abstract
A total internal reflection fluorescence microscopy technique coupled with three-dimensional tracking of nanoparticles is used to experimentally verify the theory on near-wall hindered Brownian motion [Goldman et al., Chem. Eng. Sci. 22, 637 (1967); Brenner, Chem. Eng. Sci. 16, 242 (1967)] very close to the solid surface (within ). The measured mean square displacements (MSDs) in the lateral directions show good agreement with the theory for all tested nanoparticles of radii 50, 100, 250, and 500 nm. However, the measured MSDs in the direction deviate substantially from the theory particularly for the case of smaller particles of 50 and 100 nm radius. Since the theory considers only the hydrodynamic interaction of moving particles with a stationary solid wall, additionally possible interaction forces like gravitational forces, van der Waals forces, and electro-osmotic forces have been examined to delineate the physical reasons for the discrepancy.
Keywords
This publication has 15 references indexed in Scilit:
- Near-surface velocimetry using evanescent wave illuminationExperiments in Fluids, 2004
- Near-wall hindered Brownian diffusion of nanoparticles examined by three-dimensional ratiometric total internal reflection fluorescence microscopy (3-D R-TIRFM)Experiments in Fluids, 2004
- Three-Dimensional Tracking of Nanoparticles Using R-TIRFM TechniqueJournal of Heat Transfer, 2004
- Hindered diffusion of colloidal particles very near to a wall: RevisitedThe Journal of Chemical Physics, 2000
- Observing Secretory Granules with a Multiangle Evanescent Wave MicroscopeBiophysical Journal, 2000
- Measurement of colloidal forces with TIRMAdvances in Colloid and Interface Science, 1999
- Stokesian DynamicsAnnual Review of Fluid Mechanics, 1988
- Slow viscous motion of a sphere parallel to a plane wall—I Motion through a quiescent fluidChemical Engineering Science, 1967
- The slow motion of a sphere through a viscous fluid towards a plane surfaceChemical Engineering Science, 1961
- Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten TeilchenAnnalen der Physik, 1905