Curvature-induced crosshatched order in two-dimensional semiflexible polymer networks

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Cyril Vrusch, Cornelis Storm

Abstract

A recurring motif in the organization of biological tissues are networks of long, fibrillar protein strands effectively confined to cylindrical surfaces. Often, the fibers in such curved, quasi-two-dimensional (2D) geometries adopt a characteristic order: the fibers wrap around the central axis at an angle which varies with radius and, in several cases, is strongly bimodally distributed. In this Rapid Communication, we investigate the general problem of a 2D crosslinked network of semiflexible fibers confined to a cylindrical substrate, and demonstrate that in such systems the trade-off between bending and stretching energies, very generically, gives rise to crosshatched order. We discuss its general dependency on the radius of the confining cylinder, and present an intuitive model that illustrates the basic physical principle of curvature-induced order. Our findings shed new light on the potential origin of some curiously universal fiber orientational distributions in tissue biology, and suggests novel ways in which synthetic polymeric soft materials may be instructed or programmed to exhibit preselected macromolecular ordering.

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Citations

Jan 20, 2018·Physical Review. E·Mathijs F J VermeulenWouter G Ellenbroek
Aug 11, 2017·Scientific Reports·Slav A SemerdzhievMireille M A E Claessens

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