Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions
We consider the situation in which a colloidal particle modifies locally the solvent leading to a spatially dependent viscosity. This situation is typical for colloidal particles in crowded environment, for example DNA-grafted particles in a polymer solution, or a hot particle which implies a temper...
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2019-09-01
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doaj-7fc78b1881af41e384dd0e58ff9d71a82020-11-24T21:46:27ZengFrontiers Media S.A.Frontiers in Physics2296-424X2019-09-01710.3389/fphy.2019.00122480689Drag Force for Asymmetrically Grafted Colloids in Polymer SolutionsMatthias Werner0Matthias Werner1Paolo Margaretti2Anna Maciołek3Anna Maciołek4Department of Inhomogeneous Condensed Matter, Max-Planck-Institut für Intelligente Systeme, Stuttgart, GermanyIV. Institut für Theoretische Physik, Universität Stuttgart, Stuttgart, GermanyDepartment of Inhomogeneous Condensed Matter, Max-Planck-Institut für Intelligente Systeme, Stuttgart, GermanyDepartment of Inhomogeneous Condensed Matter, Max-Planck-Institut für Intelligente Systeme, Stuttgart, GermanyInstitute of Physical Chemistry, Polish Academy of Sciences, Warsaw, PolandWe consider the situation in which a colloidal particle modifies locally the solvent leading to a spatially dependent viscosity. This situation is typical for colloidal particles in crowded environment, for example DNA-grafted particles in a polymer solution, or a hot particle which implies a temperature gradient to a viscous liquid. By means of suitable approximations we calculate the dependence of the friction force on the profile of the local viscosity. Our results show that in the case of axially symmetric viscosity profile the friction force is sensitive to the anisotropy of the viscous profile whereas it is not sensitive to for-ahead asymmetries. Our results are crucial for active microrheology measurements where tracer particles are pulled through complex fluids.https://www.frontiersin.org/article/10.3389/fphy.2019.00122/fullcrowded environmentspolymer solutiondrag forceanisotropic viscositytransport phenomena and fluid mechanicsfunctionalized colloids |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Matthias Werner Matthias Werner Paolo Margaretti Anna Maciołek Anna Maciołek |
spellingShingle |
Matthias Werner Matthias Werner Paolo Margaretti Anna Maciołek Anna Maciołek Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions Frontiers in Physics crowded environments polymer solution drag force anisotropic viscosity transport phenomena and fluid mechanics functionalized colloids |
author_facet |
Matthias Werner Matthias Werner Paolo Margaretti Anna Maciołek Anna Maciołek |
author_sort |
Matthias Werner |
title |
Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions |
title_short |
Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions |
title_full |
Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions |
title_fullStr |
Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions |
title_full_unstemmed |
Drag Force for Asymmetrically Grafted Colloids in Polymer Solutions |
title_sort |
drag force for asymmetrically grafted colloids in polymer solutions |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Physics |
issn |
2296-424X |
publishDate |
2019-09-01 |
description |
We consider the situation in which a colloidal particle modifies locally the solvent leading to a spatially dependent viscosity. This situation is typical for colloidal particles in crowded environment, for example DNA-grafted particles in a polymer solution, or a hot particle which implies a temperature gradient to a viscous liquid. By means of suitable approximations we calculate the dependence of the friction force on the profile of the local viscosity. Our results show that in the case of axially symmetric viscosity profile the friction force is sensitive to the anisotropy of the viscous profile whereas it is not sensitive to for-ahead asymmetries. Our results are crucial for active microrheology measurements where tracer particles are pulled through complex fluids. |
topic |
crowded environments polymer solution drag force anisotropic viscosity transport phenomena and fluid mechanics functionalized colloids |
url |
https://www.frontiersin.org/article/10.3389/fphy.2019.00122/full |
work_keys_str_mv |
AT matthiaswerner dragforceforasymmetricallygraftedcolloidsinpolymersolutions AT matthiaswerner dragforceforasymmetricallygraftedcolloidsinpolymersolutions AT paolomargaretti dragforceforasymmetricallygraftedcolloidsinpolymersolutions AT annamaciołek dragforceforasymmetricallygraftedcolloidsinpolymersolutions AT annamaciołek dragforceforasymmetricallygraftedcolloidsinpolymersolutions |
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1725902047079825408 |