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Interaction between covalent DNA gels and a cationic surfactant

Costa, Diana LU ; Hansson, P ; Schneider, S ; Miguel, MG and Lindman, Björn LU (2006) In Biomacromolecules 7(4). p.1090-1095
Abstract
The interaction of covalently cross-linked double-stranded (ds) DNA gels and cetyltrimethylammonium bromide (CTAB) is investigated. The volume transition of the gels that follows the absorption of the oppositely charged surfactant from aqueous solution is studied. As do other polyelectrolyte networks, DNA networks form complexes with oppositely charged surfactant micelles at surfactant concentrations far below the critical micelle concentration (cmc) of the polymer-free solution. The size of the absorbed surfactant aggregates is determined from time-resolved fluorescence quenching (TRFQ). At low surfactant concentrations, small discrete micelles (160 < N < 210) are found, whereas large micelles (N > 500) form at surfactant... (More)
The interaction of covalently cross-linked double-stranded (ds) DNA gels and cetyltrimethylammonium bromide (CTAB) is investigated. The volume transition of the gels that follows the absorption of the oppositely charged surfactant from aqueous solution is studied. As do other polyelectrolyte networks, DNA networks form complexes with oppositely charged surfactant micelles at surfactant concentrations far below the critical micelle concentration (cmc) of the polymer-free solution. The size of the absorbed surfactant aggregates is determined from time-resolved fluorescence quenching (TRFQ). At low surfactant concentrations, small discrete micelles (160 < N < 210) are found, whereas large micelles (N > 500) form at surfactant concentrations of 1 mM. When the DNA is in excess of the surfactant, the surfactant binding is essentially quantitative. The gel volume decreases by 90% when the surfactant to DNA charge ratio, beta, increases from 0 to 1. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Biomacromolecules
volume
7
issue
4
pages
1090 - 1095
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000236868800013
  • pmid:16602725
  • scopus:33646341212
ISSN
1526-4602
DOI
10.1021/bm0508919
language
English
LU publication?
yes
id
d2721247-d80f-4d06-8d50-32621b712997 (old id 414209)
date added to LUP
2016-04-01 12:08:49
date last changed
2021-06-16 05:35:24
@article{d2721247-d80f-4d06-8d50-32621b712997,
  abstract     = {The interaction of covalently cross-linked double-stranded (ds) DNA gels and cetyltrimethylammonium bromide (CTAB) is investigated. The volume transition of the gels that follows the absorption of the oppositely charged surfactant from aqueous solution is studied. As do other polyelectrolyte networks, DNA networks form complexes with oppositely charged surfactant micelles at surfactant concentrations far below the critical micelle concentration (cmc) of the polymer-free solution. The size of the absorbed surfactant aggregates is determined from time-resolved fluorescence quenching (TRFQ). At low surfactant concentrations, small discrete micelles (160 &lt; N &lt; 210) are found, whereas large micelles (N &gt; 500) form at surfactant concentrations of 1 mM. When the DNA is in excess of the surfactant, the surfactant binding is essentially quantitative. The gel volume decreases by 90% when the surfactant to DNA charge ratio, beta, increases from 0 to 1.},
  author       = {Costa, Diana and Hansson, P and Schneider, S and Miguel, MG and Lindman, Björn},
  issn         = {1526-4602},
  language     = {eng},
  number       = {4},
  pages        = {1090--1095},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Biomacromolecules},
  title        = {Interaction between covalent DNA gels and a cationic surfactant},
  url          = {http://dx.doi.org/10.1021/bm0508919},
  doi          = {10.1021/bm0508919},
  volume       = {7},
  year         = {2006},
}