This title appears in the Scientific Report :
2018
Please use the identifier:
http://hdl.handle.net/2128/18273 in citations.
Please use the identifier: http://dx.doi.org/10.1063/1.5001886 in citations.
Steady state sedimentation of ultrasoft colloids
Steady state sedimentation of ultrasoft colloids
The structural and dynamical properties of ultra-soft colloids—star polymers—exposed to a uniform external force field are analyzed by applying the multiparticle collision dynamics technique, a hybrid coarse-grain mesoscale simulation approach, which captures thermal fluctuations and long-range hydr...
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Personal Name(s): | Singh, Sunil P. |
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Gompper, Gerhard (Corresponding author) / Winkler, Roland G. (Corresponding author) | |
Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IAS-2 Theorie der Weichen Materie und Biophysik; ICS-2 |
Published in: | The journal of chemical physics, 148 (2018) 8, S. 084901 |
Imprint: |
Melville, NY
American Institute of Physics
2018
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PubMed ID: |
29495770 |
DOI: |
10.1063/1.5001886 |
Document Type: |
Journal Article |
Research Program: |
Functional Macromolecules and Complexes |
Link: |
Published on 2018-02-22. Available in OpenAccess from 2019-02-22. Published on 2018-02-22. Available in OpenAccess from 2019-02-22. |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1063/1.5001886 in citations.
The structural and dynamical properties of ultra-soft colloids—star polymers—exposed to a uniform external force field are analyzed by applying the multiparticle collision dynamics technique, a hybrid coarse-grain mesoscale simulation approach, which captures thermal fluctuations and long-range hydrodynamic interactions. In the weak-field limit, the structure of the star polymer is nearly unchanged; however, in an intermediate regime, the radius of gyration decreases, in particular transverse to the sedimentation direction. In the limit of a strong field, the radius of gyration increases with field strength. Correspondingly, the sedimentation coefficient increases with increasing field strength, passes through a maximum, and decreases again at high field strengths. The maximum value depends on the functionality of the star polymer. High field strengths lead to symmetry breaking with trailing, strongly stretched polymer arms and a compact star-polymer body. In the weak-field-linear response regime, the sedimentation coefficient follows the scaling relation of a star polymer in terms of functionality and arm length |