The electrostatic origin of chiral patterns on nanofibers

Graziano Vernizzi; Kevin L. Kohlstedt; Monica Olvera de la Cruz

doi:10.1039/B814583K

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Soft Matter

Issue 4, 2009

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The electrostatic origin of chiral patterns on nanofibers

Graziano Vernizzi , Kevin L. Kohlstedt and Monica Olvera de la Cruz

Soft Matter, 2009, 5, 736-739

DOI: 10.1039/B814583K
Received 22 Aug 2008, Accepted 15 Dec 2008
First published on the web 16 Jan 2009

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Several recent research works focus on nanofibers covered by molecules that self-assemble into chiral helices. While the formation of helical structures has been explained mostly on a case by case basis, the ubiquitous presence of chirality at the nanoscale suggests the existence of a unifying description. We present a model for computing the optimal arrangement of charged stripes over a cylindrical fiber, and show how helical structures can arise spontaneously from screened Coulomb interactions. We obtain the phase diagram and discuss some applications to nanoscale systems such as self-assembled peptide nanotubes, carbon nanotubes, and filamentous viruses.

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