ArticleThe European physical journal. E, Soft matter2015
Equilibrium gels of trivalent DNA-nanostars: Effect of the ionic strength on the dynamics.
Article in The European physical journal. E, Soft matter, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Phase-transition-like behaviors of sequence-selective dynamic bonds.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Spatially uniform dynamics in equilibrium colloidal gels.Science advances · 2021Article
- Amphiphilic DNA nanostructures for bottom-up synthetic biology.Chemical communications (Cambridge, England) · 2021Review
- DNA-GEL, Novel Nanomaterial for Biomedical Applications and Delivery of Bioactive Molecules.Frontiers in pharmacology · 2020Review
- Article
- Article
- Re-entrant DNA gels.Nature communications · 2016Article
- Article
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6 authors.
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Abstract
Self-assembling DNA-nanostars are ideal candidates to explore equilibrium gelation in systems composed of limited-valence particles. We present here a light scattering study of the dynamics in a trivalent DNA-nanostars equilibrium gel and of its dependence on ionic strength and concentration. Reversible bonds between different nanostars, whose formation is sensitively dependent on temperature, concentration and ionic strength, are provided by complementary DNA sticky ends. We find that the decay of the density correlations is described by a two-step relaxation process characterised by: i) a slow time scale that varies over nearly four orders of magnitude in a temperature window of less than 30 degrees; ii) an increase of the amplitude (the so-called non-ergodicity factor) of the slow relaxation. The slow process follows an Arrhenius law with temperature. We observe that the activation enthalpy does not depend on the ionic strength and that the dependence of the relaxation time on the ionic strength can be rationalized in terms of the free-energy cost of forming a sticky-end duplex. Finally, we observe that dynamics is insensitive to nanostar concentration, in full agreement with the predicted behaviour in equilibrium gels.
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