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I've measured the hydrodynamic thickness of a NaPSS layer on polystyrene latex and plotted it against the concentration of the supporting electrolyte, NaCl. My graph shows a general decrease in thickness with some fluctuations at earlier concentrations. I thought that thickness would increase with concentration due to more charge screening. Can anyone help explain these results? thickness vs. concentration

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  • $\begingroup$ Osmotic pressure? $\endgroup$ – Karl Feb 13 at 23:15

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