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Issue 33, 2016
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The role of a small-scale cutoff in determining molecular layers at fluid interfaces

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Abstract

The existence of molecular layers at liquid/vapour interfaces has been a long debated issue. More than ten years ago it was shown, using computer simulations, that correlations at the liquid/vapour interface resemble those of bulk liquids, even though they can be detected in experiments only in a few cases, where they are so strong that they cannot be concealed by the geometrical smearing of capillary fluctuations. The results of the intrinsic analysis techniques used in computer experiments, however, are still often questioned because of their dependence on a free parameter that usually represents a small-scale cutoff used to determine the interface. In this work I show that there is only one value of the cutoff that can ensure a quantitative explanation of the intrinsic density correlation peaks in terms of successive layer contributions. The value of the cutoff coincides, with a high accuracy, with the molecular diameter.

Graphical abstract: The role of a small-scale cutoff in determining molecular layers at fluid interfaces

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Publication details

The article was received on 09 Jul 2016, accepted on 02 Aug 2016 and first published on 02 Aug 2016


Article type: Paper
DOI: 10.1039/C6CP04788B
Citation: Phys. Chem. Chem. Phys., 2016,18, 23354-23357
  • Open access: Creative Commons BY license
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    The role of a small-scale cutoff in determining molecular layers at fluid interfaces

    M. Sega, Phys. Chem. Chem. Phys., 2016, 18, 23354
    DOI: 10.1039/C6CP04788B

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