Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions
A model of rod-like polyelectrolyte brushes in the presence of monovalent and multivalent counterions but with no added-salt is studied using Monte Carlo simulation. The average height of the brush, the histogram of rod conformations, and the counterion density profile are obtained for different val...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2007
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| _version_ | 1826272532500578304 |
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| author | Fazli, H Golestanian, R Hansen, P Kolahchi, MR |
| author_facet | Fazli, H Golestanian, R Hansen, P Kolahchi, MR |
| author_sort | Fazli, H |
| collection | OXFORD |
| description | A model of rod-like polyelectrolyte brushes in the presence of monovalent and multivalent counterions but with no added-salt is studied using Monte Carlo simulation. The average height of the brush, the histogram of rod conformations, and the counterion density profile are obtained for different values of the grafting density of the charge-neutral wall. For a domain of grafting densities, the brush height is found to be relatively insensitive to the density due to a competition between counterion condensation and inter-rod repulsion. In this regime, multivalent counterions collapse the brush in the form of linked clusters. Nematic order emerges at high grafting densities, resulting is an abrupt increase of the brush height. |
| first_indexed | 2024-03-06T22:14:03Z |
| format | Journal article |
| id | oxford-uuid:52cd40ca-89cb-4a6e-bedd-4f6379f061bb |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:14:03Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:52cd40ca-89cb-4a6e-bedd-4f6379f061bb2022-03-26T16:27:38ZRod-like Polyelectrolyte Brushes with Mono- and Multivalent CounterionsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:52cd40ca-89cb-4a6e-bedd-4f6379f061bbEnglishSymplectic Elements at Oxford2007Fazli, HGolestanian, RHansen, PKolahchi, MRA model of rod-like polyelectrolyte brushes in the presence of monovalent and multivalent counterions but with no added-salt is studied using Monte Carlo simulation. The average height of the brush, the histogram of rod conformations, and the counterion density profile are obtained for different values of the grafting density of the charge-neutral wall. For a domain of grafting densities, the brush height is found to be relatively insensitive to the density due to a competition between counterion condensation and inter-rod repulsion. In this regime, multivalent counterions collapse the brush in the form of linked clusters. Nematic order emerges at high grafting densities, resulting is an abrupt increase of the brush height. |
| spellingShingle | Fazli, H Golestanian, R Hansen, P Kolahchi, MR Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title | Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title_full | Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title_fullStr | Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title_full_unstemmed | Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title_short | Rod-like Polyelectrolyte Brushes with Mono- and Multivalent Counterions |
| title_sort | rod like polyelectrolyte brushes with mono and multivalent counterions |
| work_keys_str_mv | AT fazlih rodlikepolyelectrolytebrusheswithmonoandmultivalentcounterions AT golestanianr rodlikepolyelectrolytebrusheswithmonoandmultivalentcounterions AT hansenp rodlikepolyelectrolytebrusheswithmonoandmultivalentcounterions AT kolahchimr rodlikepolyelectrolytebrusheswithmonoandmultivalentcounterions |