Transition from fractional to classical Stokes-Einstein behaviour in simple fluids

Coglitore, Diego, Edwardson, Stuart ORCID: 0000-0001-5239-4409, Macko, Peter, Patterson, Eann ORCID: 0000-0003-4397-2160 and Whelan, Maurice (2017) Transition from fractional to classical Stokes-Einstein behaviour in simple fluids. Royal Society Open Science, 4 (12). 170507-.

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Official URL: https://royalsocietypublishing.org/doi/10.1098/rso...

Abstract

An optical technique for tracking single particles has been used to evaluate the particle diameter at which diffusion transitions from molecular behaviour described by the fractional Stokes-Einstein relationship to particle behaviour described by the classical Stokes-Einstein relationship. The results confirm a prior prediction from molecular dynamic simulations that there is a particle size at which transition occurs and show it is inversely dependent on concentration and viscosity but independent of particle density. For concentrations in the range 5×10 −3 to 5×10 −6 mgml −1 and viscosities from 0.8 to 150 mPa s, the transition was found to occur in the diameter range 150-300 nm.

Item Type:	Article
Uncontrolled Keywords:	diffusion, Stokes–Einstein diffusion, fractional Stokes–Einstein equation, single nanoparticle tracking, nanoparticles
Depositing User:	Symplectic Admin
Date Deposited:	02 Jan 2018 10:23
Last Modified:	19 Jan 2023 06:46
DOI:	10.1098/rsos.170507
Open Access URL:	http://rsos.royalsocietypublishing.org/content/4/1...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3015254