NDLI: Electrostatic-driven pattern formation in fibers, nanotubes and pores

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Back cover

Soft Matter Vol - 7 Issue - 3

Electrostatic-driven pattern formation in fibers, nanotubes and pores

Content Provider	Royal Society of Chemistry (RSC)
Author	Solis, Francisco J. Vernizzi, Graziano Cruz, Monica Olvera de
Copyright Year	2011
Abstract	The physical properties of interfaces between media with different dielectric permittivities are modified by the adsorption of charged particles. The adsorbed charges can be arranged into self-assembled nanostructures with properties that can be controlled by, for example, varying the ionic abundance of charged species in the media separated by the interface. The presence of inhomogeneous charge distributions at interfaces between media with different dielectric permittivity is a crucial feature of many interesting physical systems including clay, biological ion channels, and DNA-carbon nanotubes complexes. We describe here a general formalism using the electrostatic Green's function to compute the optimal arrangement of charges in cylindrical geometry. This geometry serves as model for a porous medium or a fiber. We study, in particular, the electrostatic energy of charged lamellar structures that cover the cylinder. We demonstrate that, under a variety of conditions, chiral helices are the preferred structure adopted by the lamellar system. These helices are more prominent in systems with higher permittivity in the interior of a tube separating two media, such as in porous media and ion channels, than in fibers with low dielectric interiors in aqueous media. We also analyze the effect of line tension on the surface pattern that competes with the charge-accumulation penalty upon the adsorption of polyions with hydrophobic groups.
Starting Page	1456
Ending Page	1466
Page Count	11
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	7
Issue Number	4
Journal	Soft Matter
DOI	10.1039/c0sm00706d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Adsorption Chirality Porous medium Clay minerals Ion Hydrophobe Dielectric Permittivity Molecular geometry
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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Electrostatic-driven pattern formation in fibers, nanotubes and pores

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