Category Archives: Publications

Curvature-induced symmetry breaking determines the wrinkling pattern in Nature Materials

Our paper on the Curvature-induced symmetry breaking determines elastic surface patterns” has just been published online in Nature Materials !

The wrinkling morphologies of our curved elastic bilayer materials are further analyzed in collaboration with a team from the Math department of MIT. The pattern formation is described here by deriving a generalized Swift-Hohenberg theory. This theory, universally applicable to macroscopic and microscopic systems, can be extend to arbitrarily shaped surfaces, thereby solving a longstanding problem in elasticity theory.

Highlighted story by the press

N. Stoop, R. Lagrange, D. Terwagne, P. M. Reis and J. DunkelCurvature-induced symmetry breaking determines elastic surface patterns, Nat. Mat., DOI:10.1038/nmat4202.    [html, pdf, SI]

Wrinkling crystallography on spherical surfaces in PNAS

Our paper on the Wrinkling crystallography on spherical surfaces” has just been published in PNAS !

Curved crystals cannot comprise hexagons alone; additional defects are required by both topology and energetics that depend on the system size. Treating dimples, generated through curved wrinkling, as point-like packing units, we show that our system can be mapped into and described within the framework of curved crystallography, albeit with some important differences attributed to the far-from-equilibrium nature of our patterns.

M. Brojan, D. Terwagne, R. Lagrange and P. M. Reis, “Wrinkling crystallography on spherical surfaces”, Proc. Natl. Acad. Sci. U.S.A., 112, 14. [htmlpdf]