Jump to main content
Jump to site search

Issue 4, 2018
Previous Article Next Article

Nonadditive interactions and phase transitions in strongly confined colloidal systems

Author affiliations

Abstract

The behaviour of colloids can be controlled effectively by tuning the solvent-mediated interactions among them. An extensively studied example is the temperature-induced aggregation of suspended colloids close to the consolute point of their binary solvent. Here, using mean field theory and Monte Carlo simulations, we study the behaviour of colloids confined to a narrow slit containing a nearly-critical binary liquid mixture. We found that the effective interactions in this system are highly non-additive. In particular, the effective interactions among the colloids can be a few times stronger than the corresponding sum of the effective pair potentials. Inter alia, this non-additivity manifests itself in the phase behaviour of confined colloids, which depends sensitively on the slit width and temperature. In addition, we demonstrate the possibility of a first-order bridging transition between colloids confined to a slit and suspended in a phase-separated fluid well below the critical point of the solvent and at its critical composition in the bulk. This transition is accompanied by a remarkably large hysteresis loop, in which the force between the colloids varies by two orders of magnitude.

Graphical abstract: Nonadditive interactions and phase transitions in strongly confined colloidal systems

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Jul 2017, accepted on 25 Oct 2017 and first published on 21 Dec 2017


Article type: Paper
DOI: 10.1039/C7SM01363A
Citation: Soft Matter, 2018,14, 586-596
  • Open access: Creative Commons BY license
  •   Request permissions

    Nonadditive interactions and phase transitions in strongly confined colloidal systems

    O. A. Vasilyev, S. Dietrich and S. Kondrat, Soft Matter, 2018, 14, 586
    DOI: 10.1039/C7SM01363A

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements