Chiral topographic instability in shrinking spheres.

ABSTRACT: Many biological structures exhibit intriguing morphological patterns adapted to environmental cues, which contribute to their important biological functions and also inspire material designs. Here, we report a chiral wrinkling topography in shrinking core-shell spheres, as observed in excessively dehydrated passion fruit and experimentally demonstrated in silicon core-shells under air extraction. Upon shrinkage deformation, the surface initially buckles into a buckyball pattern (periodic hexagons and pentagons) and then transforms into a chiral mode. The neighbouring chiral cellular patterns can further interact with each other, resulting in secondary symmetry breaking and the formation of two types of topological network. We develop a core-shell model and derive a universal scaling law to

SUBMITTER: Xu F 

PROVIDER: S-EPMC10766550 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature