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Title: Mixtures of ions and amphiphilic molecules in slit-like pores: A density functional approach

Abstract

We investigate microscopic structure and thermodynamic properties of a mixture that contains amphiphilic molecules and charged hard spheres confined in slit-like pores with uncharged hard walls. The model and the density functional approach are the same as described in details in our previous work [Pizio et al., J. Chem. Phys. 140, 174706 (2014)]. Our principal focus is in exploring the effects brought by the presence of ions on the structure of confined amphiphilic particles. We have found that for some cases of anisotropic interactions, the change of the structure of confined fluids occurs via the first-order transitions. Moreover, if anions and cations are attracted by different hemispheres of amphiphiles, a charge at the walls appears at the zero value of the wall electrostatic potential. For a given thermodynamic state, this charge is an oscillating function of the pore width.

Authors:
 [1]; ;  [2];  [3]
  1. Instituto de Química, Universidad Nacional Autonoma de México, Circuito Exterior, Ciudad Universitaria, 04510 México, D. F. (Mexico)
  2. Department for the Modeling of Physico-Chemical Processes, Maria Curie-Skłodowska University, 20-031 Lublin (Poland)
  3. Institute of Agrophysics, Polish Academy of Sciences, Doś wiadczalna 4, 20-290 Lublin (Poland)
Publication Date:
OSTI Identifier:
22415720
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 142; Journal Issue: 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANIONS; ANISOTROPY; CATIONS; DENSITY FUNCTIONAL METHOD; FLUIDS; MIXTURES; MOLECULES; POTENTIALS; SPHERES; THERMODYNAMIC PROPERTIES

Citation Formats

Pizio, O., E-mail: pizio@unam.mx, Rżysko, W., E-mail: wojtekrzysko@gmail.com, Sokołowski, S., E-mail: stefan.sokolowski@gmail.com, and Sokołowska, Z., E-mail: sokolows@ipan.lublin.pl. Mixtures of ions and amphiphilic molecules in slit-like pores: A density functional approach. United States: N. p., 2015. Web. doi:10.1063/1.4918640.
Pizio, O., E-mail: pizio@unam.mx, Rżysko, W., E-mail: wojtekrzysko@gmail.com, Sokołowski, S., E-mail: stefan.sokolowski@gmail.com, & Sokołowska, Z., E-mail: sokolows@ipan.lublin.pl. Mixtures of ions and amphiphilic molecules in slit-like pores: A density functional approach. United States. https://doi.org/10.1063/1.4918640
Pizio, O., E-mail: pizio@unam.mx, Rżysko, W., E-mail: wojtekrzysko@gmail.com, Sokołowski, S., E-mail: stefan.sokolowski@gmail.com, and Sokołowska, Z., E-mail: sokolows@ipan.lublin.pl. 2015. "Mixtures of ions and amphiphilic molecules in slit-like pores: A density functional approach". United States. https://doi.org/10.1063/1.4918640.
@article{osti_22415720,
title = {Mixtures of ions and amphiphilic molecules in slit-like pores: A density functional approach},
author = {Pizio, O., E-mail: pizio@unam.mx and Rżysko, W., E-mail: wojtekrzysko@gmail.com and Sokołowski, S., E-mail: stefan.sokolowski@gmail.com and Sokołowska, Z., E-mail: sokolows@ipan.lublin.pl},
abstractNote = {We investigate microscopic structure and thermodynamic properties of a mixture that contains amphiphilic molecules and charged hard spheres confined in slit-like pores with uncharged hard walls. The model and the density functional approach are the same as described in details in our previous work [Pizio et al., J. Chem. Phys. 140, 174706 (2014)]. Our principal focus is in exploring the effects brought by the presence of ions on the structure of confined amphiphilic particles. We have found that for some cases of anisotropic interactions, the change of the structure of confined fluids occurs via the first-order transitions. Moreover, if anions and cations are attracted by different hemispheres of amphiphiles, a charge at the walls appears at the zero value of the wall electrostatic potential. For a given thermodynamic state, this charge is an oscillating function of the pore width.},
doi = {10.1063/1.4918640},
url = {https://www.osti.gov/biblio/22415720}, journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 16,
volume = 142,
place = {United States},
year = {Tue Apr 28 00:00:00 EDT 2015},
month = {Tue Apr 28 00:00:00 EDT 2015}
}