(a) The average fraction of PNIPAM–anion bonds as a function of a temperature in sodium halide solutions. The inset shows local fraction of PNIPAM–anion bonds as a function of distance from the substrate surface. (b) The average fraction of PNIPAM–anion bonds as a function of χ for a temperature of T = 25 °C in sodium halide solutions. The molecular weight of the polymer chain is M_w = 22500 g·mol⁻¹, and the surface coverage is σ = 0.5 nm⁻².