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- W2026175578 abstract "Self-consistent field theory (SCFT) is presented to study the adsorption of flexible polyelectrolytes (PE) onto uniformly oppositely charged cylinders. We focus on the curvature effect of adsorbing surface on the adsorption−depletion phase-transition-like behavior. Numerical solutions for SCFT functions are derived. In terms of the scaling expression (Csalt∗ ∼ pασβ) of the critical quantities, i.e., the salt concentration Csalt∗, the charge fraction p of PE chain and the area density of surface charge σ, at the adsorption−depletion transition point, we divide the whole curvature dimension into two regimes, i.e., the planar regime and the cylindrical regime. In particular, we have numerically determined the crossover point of the two regimes at which the cylinder radius r0 approximately equates to 2 times the gyration radius Rg of PE chain, or, r0 ∼ 2Rg. In the planar regime (r0 > 2Rg), the scaling expression is invariable with surface curvature and is reduced to the planar case, or Csalt∗ ∼ (pσ)2/3. In the cylindrical regime (r0 < 2Rg), the exponents in the scaling expression increase as r0 decreases and lead to Csalt∗ ∼ p0.78σ0.86 for a large surface curvature r0 = 0.1Rg. Moreover, we find a critical line for the dependence of the critical radius of cylinder on the salt concentration, which separates the adsorption and depletion states. The theoretical results are in good agreement with the Monte Carlo simulations and the experimental results." @default.
- W2026175578 created "2016-06-24" @default.
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- W2026175578 date "2008-06-18" @default.
- W2026175578 modified "2023-09-27" @default.
- W2026175578 title "Adsorption and Depletion of Polyelectrolytes in Charged Cylindrical System within Self-Consistent Field Theory" @default.
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- W2026175578 doi "https://doi.org/10.1021/ma8003482" @default.
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