General Model of Hindered Diffusion

The diffusion of a particle from bulk solution is slowed as it moves close to an adsorbing surface. A general model is reported that is easily applied by theoreticians and experimentalists. Specifically, it is shown here that in general and regardless of the space size, the magnitude of the effect o...

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প্রধান লেখক: Eloul, S, Compton, R
বিন্যাস: Journal article
ভাষা:English
প্রকাশিত: American Chemical Society 2016
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author Eloul, S
Compton, R
author_facet Eloul, S
Compton, R
author_sort Eloul, S
collection OXFORD
description The diffusion of a particle from bulk solution is slowed as it moves close to an adsorbing surface. A general model is reported that is easily applied by theoreticians and experimentalists. Specifically, it is shown here that in general and regardless of the space size, the magnitude of the effect of hindered diffusion on the flux is a property of the diffusion layer thickness. We explain and approximate the effect. Predictions of concentration profiles show that a "hindered diffusion layer" is formed near the adsorbing surface within the diffusion layer, observed even when the particle radius is just a 0.1% of the diffusion layer thickness. In particular, we focus on modern electrochemistry processes involving with impact of particles with either ultrasmall electrodes or particles in convective systems. The concept of the "hindered diffusion layer" is generally important for example in recent biophysical models of particles diffusion to small targets.
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spelling oxford-uuid:57a688b4-858b-4d35-8049-9d55d5b0e0b32022-03-26T16:58:02ZGeneral Model of Hindered DiffusionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:57a688b4-858b-4d35-8049-9d55d5b0e0b3EnglishSymplectic Elements at OxfordAmerican Chemical Society2016Eloul, SCompton, RThe diffusion of a particle from bulk solution is slowed as it moves close to an adsorbing surface. A general model is reported that is easily applied by theoreticians and experimentalists. Specifically, it is shown here that in general and regardless of the space size, the magnitude of the effect of hindered diffusion on the flux is a property of the diffusion layer thickness. We explain and approximate the effect. Predictions of concentration profiles show that a "hindered diffusion layer" is formed near the adsorbing surface within the diffusion layer, observed even when the particle radius is just a 0.1% of the diffusion layer thickness. In particular, we focus on modern electrochemistry processes involving with impact of particles with either ultrasmall electrodes or particles in convective systems. The concept of the "hindered diffusion layer" is generally important for example in recent biophysical models of particles diffusion to small targets.
spellingShingle Eloul, S
Compton, R
General Model of Hindered Diffusion
title General Model of Hindered Diffusion
title_full General Model of Hindered Diffusion
title_fullStr General Model of Hindered Diffusion
title_full_unstemmed General Model of Hindered Diffusion
title_short General Model of Hindered Diffusion
title_sort general model of hindered diffusion
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AT comptonr generalmodelofhindereddiffusion