Wrinkles and splay conspire to give positive disclinations negative curvature

Elisabetta A. Matsumoto, Daniel A. Vega, Aldo D. Pezzutti, Nicolás A. García, Paul M. Chaikin, Richard A. Register

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Recently, there has been renewed interest in the coupling between geometry and topological defects in crystalline and striped systems. Standard lore dictates that positive disclinations are associated with positive Gaussian curvature, whereas negative disclinations give rise to negative curvature. Here, we present a diblock copolymer system exhibiting a striped columnar phase that preferentially forms wrinkles perpendicular to the underlying stripes. In freestanding films this wrinkling behavior induces negative Gaussian curvature to form in the vicinity of positive disclinations.

Original languageEnglish (US)
Pages (from-to)12639-12644
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume112
Issue number41
DOIs
StatePublished - Oct 13 2015

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • Diblock copolymer
  • Disclinations and curvature
  • Free-standing membrane
  • Smectic
  • Wrinkling instability

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