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Issue 43, 2017
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Solute particle near a nanopore: influence of size and surface properties on the solvent-mediated forces

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Abstract

Nanoscopic pores are used in various systems to attract nanoparticles. In general the behaviour is a result of two types of interactions: the material specific affinity and the solvent-mediated influence also called the depletion force. The latter is more universal but also much more complex to understand since it requires modeling both the nanoparticle and the solvent. Here, we employed classical density functional theory to determine the forces acting on a nanoparticle near a nanoscopic pore as a function of its hydrophobicity and its size. A simple capillary model is constructed to predict those depletion forces for various surface properties. For a nanoscopic pore, complexity arises from both the specific geometry and the fact that hydrophobic pores are not necessarily filled with liquid. Taking all of these effects into account and including electrostatic effects, we establish a phase diagram describing the entrance and the rejection of the nanoparticle from the pore.

Graphical abstract: Solute particle near a nanopore: influence of size and surface properties on the solvent-mediated forces

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Publication details

The article was received on 27 Sep 2017, accepted on 24 Oct 2017 and first published on 31 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR07218J
Citation: Nanoscale, 2017,9, 17099-17108
  • Open access: Creative Commons BY license
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    Solute particle near a nanopore: influence of size and surface properties on the solvent-mediated forces

    J. Lam and J. F. Lutsko, Nanoscale, 2017, 9, 17099
    DOI: 10.1039/C7NR07218J

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