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Adv Colloid Interface Sci. 2015 Sep;223:55-63. doi: 10.1016/j.cis.2015.06.007. Epub 2015 Jul 10.

Motion of nanoprobes in complex liquids within the framework of the length-scale dependent viscosity model.

Author information

1
Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. Electronic address: tkalwarczyk@ichf.edu.pl.
2
Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
3
Nencki Institute of Experimental Biology of the Polish Academy of Sciences, 3 Pasteur Street, 02-093 Warsaw, Poland.
4
Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; State Key Laboratory of Medicinal Chemical Biology, Nankai University, China.
5
Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. Electronic address: rholyst@ichf.edu.pl.

Abstract

This paper deals with the recent phenomenological model of the motion of nanoscopic objects (colloidal particles, proteins, nanoparticles, molecules) in complex liquids. We analysed motion in polymer, micellar, colloidal and protein solutions and the cytoplasm of living cells using the length-scale dependent viscosity model. Viscosity monotonically approaches macroscopic viscosity as the size of the object increases and thus gives a single, coherent picture of motion at the nano and macro scale. The model includes interparticle interactions (solvent-solute), temperature and the internal structure of a complex liquid. The depletion layer ubiquitously occurring in complex liquids is also incorporated into the model. We also discuss the biological aspects of crowding in terms of the length-scale dependent viscosity model.

KEYWORDS:

Complex liquids; Diffusion; Length-scale dependence; Soft matter; Viscosity

PMID:
26189602
DOI:
10.1016/j.cis.2015.06.007
[Indexed for MEDLINE]

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