Oscillatory structural forces between charged interfaces in solutions of oppositely charged polyelectrolytes

Kubiak, Katarzyna; Maroni, Plinio; Trefalt, Gregor; Borkovec, Michal

doi:10.1039/d0sm01257b

Cited by 4 publications

(2 citation statements)

References 51 publications

(88 reference statements)

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“…For instance, the forces induced by PEs between two charged surfaces show oscillating behaviors . Many experiments have shown that the oscillating interactions are related to the occurrence of charge reversal and inversion on the charged surfaces. − In general, due to the challenge of singling out the effects of individual variables, it is difficult to explore the origins of the rich and complicated behaviors in nanoconfined PE systems by only using experimental techniques . However, as complementary approaches, theories and simulations allow for facile control of the factors that influence the force behaviors between two charged surfaces induced by PE solutions. , Using Monte Carlo simulations, Pegado et al and Guldbrand et al found that the ion–ion correlations make the counterions adsorb more at the charged walls and thus reduce the electric double layer overlapping, which results in a shorter range of the interactions.…”

Section: Introductionmentioning

confidence: 99%

Force Regulation by Sequence-Defined Polyelectrolytes

Chang

Jiang

2023

Macromolecules

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In order to achieve multifunctional adhesive materials with water and salt tolerance, it is crucial to understand the electrostatic mechanism of nanoconfined polyelectrolytes (PEs) with specific monomer sequences. Here, using density functional theory (DFT), self-consistent field theory (SCFT), and molecular dynamics (MD) simulation, we analyzed the microstructures of sequence-defined PEs confined in a nanoscale slit and the relationship between sequences and the attractive forces induced by the nanoconfined PEs. Among three sequence-defined (alternating [A], tapered [T], and reversely tapered [R] sequence) PEs, due to the formation of stable multibridge conformations, [A]-sequence PEs induce the strongest attractive forces even in the case with high salt concentrations, i.e., the best salt tolerance. It is worth emphasizing that salt enhancement of attractive forces occurs in systems with [A]-sequence PEs due to the screening of repulsive interactions between PE chains. In contrast, in systems with [T]-sequence PEs, the shielding of the attractive interactions between surfaces and charged monomers significantly attenuates the attractive forces between surfaces at high salt concentrations. In addition, the strength of attractive forces can be regulated by block number N b. At high charge fractions such as f c = 0.5, the attractive forces induced by [A]-sequence PEs become stronger with N b, while at low charge fractions such as f c = 0.2, the attractive forces vary nonmonotonically with N b due to the electrostatic correlations.

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Section: Introductionmentioning

confidence: 99%

Force Regulation by Sequence-Defined Polyelectrolytes

Chang

Jiang

2023

Macromolecules

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“…Oscillatory structural forces in dispersions of charged colloidal particles were extensively studied for ionic micelles (Nikolov and Wasan, 1989;Bergeron and Radke, 1992;Richetti and Kékicheff, 1992;McNamee et al, 2004;Tulpar et al, 2006;Tabor et al, 2011a;Tabor et al, 2011b;James and Walz, 2014;Ochoa et al, 2021), polyelectrolytes (Milling and Vincent, 1997;Klitzing et al, 1999;Qu et al, 2006;Biggs, 2010;Üzüm et al, 2011;Browne et al, 2015;Moazzami-Gudarzi et al, 2017;Kubiak et al, 2020), and solid nanoparticles (Piech and Walz, 2002;Piech and Walz, 2004;Drelich et al, 2006;Zeng et al, 2011;Schön and von Klitzing, 2018;; experimental evidence for oscillatory structural forces in dispersion of uncharged particles is available for aqueous solutions of nonionic surfactants (Basheva et al, 2007;Christov et al, 2010) and latex particles (Basheva et al, 1997;Crocker et al, 1999).…”

Section: Introductionmentioning

confidence: 99%