Scaling of nanoparticle retardation in semi-dilute polymer solutions.
basic_science · Level V
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- Record sourced from PubMed, PMID 32907237.
- Also identified by DOI 10.1039/b711902j.
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Abstract
We analyze the scaling law for the polymer-induced retardation a nanoparticle experiences as it moves through a semi-dilute polymer solution. The translational friction is calculated from a modified Stokes flow using a local viscosity near the nanosphere. The results rationalize a general retardation factor, R = exp(Kaµcν) [T. Odijk, Biophys. J., 2000, 79, 2314], revealing scaling exponents µ = 0.77 and ν = 1, which are in agreement with experiment. We find that rotational motion also has a self-similar behavior and R can be described too by a stretched exponential with slightly different exponents.