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Langmuir. 2013 May 7;29(18):5520-7. doi: 10.1021/la400767u. Epub 2013 Apr 17.

Cation bridging studied by specular neutron reflection.

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BP Institute and Department of Chemistry, University of Cambridge, Cambridge, UK.


The binding of an anionic surfactant onto an anionic surface by addition of divalent ions is reported based on experimental data from specular neutron reflection (NR) and attenuated total internal reflection IR spectroscopy (ATR-IR). Similar measurements using monovalent ions (sodium) do not show any evidence of such adsorption, even though the amount of surfactant can be much higher. This data is interpreted in terms of the so-called bridging mechanism of ion binding.

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