How the partial-slip boundary condition can influence the interpretation of the DLS and NTA data
Artikel i vetenskaplig tidskrift, 2020

Dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA) are widely used to determine the size of biological nanoparticles in liquid. In both cases, one first measures the nanoparticle diffusion coefficient and then converts it to the nanoparticle radius via the Stokes-Einstein relation. This relation is based on the no-slip boundary condition. Now, there is evidence that this condition can be violated in biologically relevant cases (e.g., for vesicles) and that in such situations the partial-slip boundary condition is more suitable. I show (i) how the latter condition can be employed in the context of DLS and NTA and (ii) that the use of the former condition may result in underestimation of the nanoparticle radius by about 10 nm compared with the nominal one.

Size of nanoparticles

Partial-slip boundary condition

Nanoparticle tracking analysis

Stokes-Einstein relation

Dynamic light scattering


Vladimir Zhdanov

Chalmers, Fysik, Biologisk fysik

Russian Academy of Sciences

Journal of Biological Physics

0092-0606 (ISSN) 1573-0689 (eISSN)

Vol. 46 2 169-176




Biologiska vetenskaper

Matematisk analys





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