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Charging of Carboxylic Acid Monolayers with Monovalent Ions at Low Ionic Strengths: Molecular Insight Revealed by Vibrational Sum Frequency Spectroscopy

Tyrode, Eric C.; Corkery, R.


The charging of arachidic acid Langmuir monolayers as a function of subphase pH and monovalent ion concentration below 100 mM was investigated using vibrational sum frequency spectroscopy. Molecular information was obtained by targeting the vibrational modes of the carboxylic acid headgroups, alkyl chains, and water molecules in the immediate surface and diffuse double layers. The surface charge in the monolayer was experimentally determined by monitoring the hydrated carboxylate...[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Journal of Physical Chemistry C
DOI: 10.1021/acs.jpcc.8b09505


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