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Uncontaminated Hydrophobic/Water Interfaces Are Uncharged: A Reply

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Abstract

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Pure is uncharged: Uncontaminated hydrophobic interfaces, such as PMMA-H/water interfaces, are uncharged. If the macromolecules have instead ionizable carboxylic acid endgroups, such as PMMA-COOH, a surface charge similar to the contaminated oil/water interface is obtained.

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