Blunt-End Driven Re-entrant Ordering in Quasi Two-Dimensional Dispersions of Spherical DNA Brushes

dc.citation.issue2
dc.citation.rankM21a
dc.citation.spage2133
dc.citation.volume16
dc.contributor.authorRomero-Sanchez, Ivany
dc.contributor.authorPihlajamaa, Ilian
dc.contributor.authorAdžić, Natasa
dc.contributor.authorCastellano, Laura E.
dc.contributor.authorStiakakis, Emmanuel
dc.contributor.authorLikos, Christos N.
dc.contributor.authorLaurati, Marco
dc.date.accessioned2023-05-26T08:56:47Z
dc.date.available2023-05-26T08:56:47Z
dc.date.issued2022-02-22
dc.description.abstractWe investigate the effects of crowding on the conformations and assembly of confined, highly charged, and thick polyelectrolyte brushes in the osmotic regime. Particle tracking experiments on increasingly dense suspensions of colloids coated with ultralong double-stranded DNA (dsDNA) fragments reveal nonmonotonic particle shrinking, aggregation, and re-entrant ordering. Theory and simulations show that aggregation and re-entrant ordering arise from the combined effect of shrinking, which is induced by the osmotic pressure exerted by the counterions absorbed in neighbor brushes and of a short-range attractive interaction competing with electrostatic repulsion. An unconventional mechanism gives origin to the short-range attraction: blunt-end interactions between stretched dsDNA fragments of neighboring brushes, which become sufficiently intense for dense and packed brushes. The attraction can be tuned by inducing free-end backfolding through the addition of monovalent salt. Our results show that base stacking is a mode parallel to hybridization to steer colloidal assembly in which attractions can be fine-tuned through salinity and, potentially, grafting density and temperature.
dc.identifier.doi10.1021/acsnano.1c07799
dc.identifier.issn1936-0851
dc.identifier.issn1936-086X
dc.identifier.scopus2-s2.0-85125019988
dc.identifier.urihttps://pub.ipb.ac.rs/handle/123456789/41
dc.identifier.wos000776691400037
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.ispartofACS Nano
dc.relation.ispartofabbrACS Nano
dc.rightsopenAccess
dc.titleBlunt-End Driven Re-entrant Ordering in Quasi Two-Dimensional Dispersions of Spherical DNA Brushes
dc.typejournal-article
dc.type.versionpublishedVersion
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