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Change of hydrodynamic radius RH of PNIPAM in the presence of different salts relative to that in pure water (with RH = 7.75 nm). The viscosity of salt solutions was obtained via the Jones–Dole viscosity coefficients and included in the Stokes–Einstein equation (see the Supporting Information). The dashed lines indicate the range corresponding to the experimental error (±σ); hence, points outside that range may indicate significant changes in RH.
