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Issue 43, 2017
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The behavior of hydroxide and hydronium ions at the hexadecane–water interface studied with second harmonic generation and zeta potential measurements

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Abstract

By probing the electric potential at the hexadecane–water interface with second harmonic generation and the zeta potential at the surface of a hexadecane droplet in its emulsion, we show that hydronium ions don't have a specific affinity to the oil–water interface although hydroxide ions do. The observed apparent affinity of the hydronium ions to the hexadecane–water interface is more likely a result of the electro-static attraction effect. The adsorption free energy of the hydroxide ions at the oil–water interface was estimated to be −8.3 kcal mol−1. This study provides more experimental evidence for understanding the behavior of hydronium and hydoxide ions at the oil–water interface.

Graphical abstract: The behavior of hydroxide and hydronium ions at the hexadecane–water interface studied with second harmonic generation and zeta potential measurements

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Publication details

The article was received on 25 Apr 2017, accepted on 27 Sep 2017 and first published on 28 Sep 2017


Article type: Paper
DOI: 10.1039/C7SM00813A
Citation: Soft Matter, 2017,13, 7962-7968
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    The behavior of hydroxide and hydronium ions at the hexadecane–water interface studied with second harmonic generation and zeta potential measurements

    W. Gan, W. Wu, F. Yang, D. Hu, H. Fang, Z. Lan and Q. Yuan, Soft Matter, 2017, 13, 7962
    DOI: 10.1039/C7SM00813A

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