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Title: Lateral Structure Formation in Polyelectrolyte Brushes Induced by Multivalent Ions

Abstract

We provide a theoretical model for the collapse of polyelectrolyte brushes in the presence of multivalent ions, focusing on the formation of lateral inhomogeneties in the collapsed state. Polyelectrolyte brushes are important in a variety of applications, including stabilizing colloidal particles and lubricating surfaces. Many uses rely on the extension of the densely grafted polymer chains from the surface in the extended brush morphology. In the presence Extended Brush of multivalent ions, brushes are significantly shorter than in monovalent ionic solutions, which greatly affects their properties. We base our theoretical analysis on an analogous collapse of polyelectrolyte brushes in a poor solvent, providing an energy balance representation for pinned micelles and cylindrical bundles. The equilibrium brush heights predicted for these structures are of a similar magnitude to those measured experimentally. The formation of lateral structures can open new avenues for stimuli-responsive applications that rely on nanoscale pattern formation on surfaces.

Authors:
ORCiD logo [1];  [2];  [3]
  1. The Institute for Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, Illinois 60637, United States
  2. Materials Department, Room 3004 Materials Research Laboratory, University of California, Santa Barbara, Santa Barbara, California 93106, United States
  3. The Institute for Molecular Engineering, The University of Chicago, 5640 S. Ellis Ave., Chicago, Illinois 60637, United States; The Institute for Molecular Engineering, Argonne National Laboratory, 9700 Cass Avenue, Lemont, Illinois 60439, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1420326
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Macromolecules; Journal Volume: 50; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Brettmann, Blair, Pincus, Philip, and Tirrell, Matthew. Lateral Structure Formation in Polyelectrolyte Brushes Induced by Multivalent Ions. United States: N. p., 2017. Web. doi:10.1021/acs.macromol.6b02563.
Brettmann, Blair, Pincus, Philip, & Tirrell, Matthew. Lateral Structure Formation in Polyelectrolyte Brushes Induced by Multivalent Ions. United States. doi:10.1021/acs.macromol.6b02563.
Brettmann, Blair, Pincus, Philip, and Tirrell, Matthew. Fri . "Lateral Structure Formation in Polyelectrolyte Brushes Induced by Multivalent Ions". United States. doi:10.1021/acs.macromol.6b02563.
@article{osti_1420326,
title = {Lateral Structure Formation in Polyelectrolyte Brushes Induced by Multivalent Ions},
author = {Brettmann, Blair and Pincus, Philip and Tirrell, Matthew},
abstractNote = {We provide a theoretical model for the collapse of polyelectrolyte brushes in the presence of multivalent ions, focusing on the formation of lateral inhomogeneties in the collapsed state. Polyelectrolyte brushes are important in a variety of applications, including stabilizing colloidal particles and lubricating surfaces. Many uses rely on the extension of the densely grafted polymer chains from the surface in the extended brush morphology. In the presence Extended Brush of multivalent ions, brushes are significantly shorter than in monovalent ionic solutions, which greatly affects their properties. We base our theoretical analysis on an analogous collapse of polyelectrolyte brushes in a poor solvent, providing an energy balance representation for pinned micelles and cylindrical bundles. The equilibrium brush heights predicted for these structures are of a similar magnitude to those measured experimentally. The formation of lateral structures can open new avenues for stimuli-responsive applications that rely on nanoscale pattern formation on surfaces.},
doi = {10.1021/acs.macromol.6b02563},
journal = {Macromolecules},
number = 3,
volume = 50,
place = {United States},
year = {Fri Jan 13 00:00:00 EST 2017},
month = {Fri Jan 13 00:00:00 EST 2017}
}